Questions tagged [output]

A signal or power being generated by one system for consumption by another, or a connection for that purpose.

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343 views

Output impedance of CNY70 circuit

I have a CNY70 sensor connected this way: I read the output (the CNY1 port) with a PIC18F2550's ADC and in the datasheet, it tells me The maximum recommended impedance for analog sources is 2.5 kΩ....
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2answers
290 views

Output impedance of a 4mA to 20mA current loop

I have the most basic of basicness circuit. The implementation is a XTR115UA IC with a 40µA - 200µA input (based on sensor voltage) which is amplified to the desired 4mA to 20mA current in the current ...
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2answers
3k views

What is the meaning of output voltage and current?

I have a 5V power supply with DC output rating: 5V @ 1500mA. It could power my High Torque servo very well. I, however, have a fairly used 9V Alkaline battery. I shorted this battery and I measured ...
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2answers
974 views

What is the purpose of diodes in parallel with transistors in a solid state relay?

I know the diodes facing each other are for ESD protection, but what do the diodes facing opposite do ? The circuit is basically a 24V (usually used in industry) digital output.
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1answer
941 views

Using LTSpice to find the gain of NPN-PMOS folded cascode

I am trying to use LTSpice to find the gain of NPN-PMOS folded cascode. Below is the question prompt: In the problem, the parameter specifications are as follows: \begin{equation} \beta =100,\:V_A=5V\...
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2answers
500 views

Using Raspberry to switch 12V

I want to use my Raspberry Pi to turn on and off a 12V current for a certain amount of time. I've read a lot on Raspberry Stackexchange and I've understood that the 5V GPIO Pin is... Not GPIO, meaning ...
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2answers
323 views

finding output resistance of CB amplifier with ro

I have this CB amplifier circuit below This is the small signal equivalent circuit arranged to find the output resistance R_out with the r_o included Here is my analysis below to find the output ...
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2answers
257 views

About the output resistance of a voltage amplifier

I know that, if I have a voltage amplifier, the output resistance Rout should be as small as possible: indeed, if the circuit is replaced by its equivalent Thevenin's circuit (1st picture), the ...
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0answers
47 views

Op Amp Output Current Requirements

Suppose I have a circuit like the one below. In simulation, at the point of maximum current draw, I measure the current through R1 to be ~-10mA, R18 to be ~28mA, R19 to be ~28mA, R3 to be ~-25mA, and ...
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0answers
96 views

Is a 90V output spike normal for a 45V buck boost converter?

The LT5176 buck boost converter outputs a short 90-91 volt spike at at the output in the 2nd second after startup, applying power to Vin. Schematic More details at Why does this buck boost with dual ...
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1answer
1k views

Common audio signal voltage range on Line out connector

What is typical audio signal voltage range on Line out connector of consumer electronic devices? (Vmin/Vmax) I need specify Input voltage range to calculate op-amp. ...
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1answer
145 views

Retro computers and “jail bars” on the screen [closed]

I have tried to eliminate "jail bars" on the screen after UHF mod to video out (based on that: http://zx81stuff.org.uk/zx81/ts1500_video.html) by adding 460uf 16V capacitor between +5V and GND but it ...
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1answer
1k views

Fourier series of output voltage

I've been practicing some Fourier series questions and then verifying my answers by generating an equivalent graph on MATLAB and comparing it with the graph generated by PSpice in simulating the same ...
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2answers
59 views

How can I increase the number of USB outputs of a powerbank which only has one output? [closed]

I'm talking about outputs which we use to charge our devices with. Would using USB male to two USB female cord be a bad idea?
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1answer
2k views

How to determine LV CMOS output impedance?

I've successfully been using this circuit: to generate a +13 dBm sine output (the frequency is 10 MHz). The NB3N551 has an output impedance spec of ~20Ω or so, which means the input to the pi filter ...
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1answer
1k views

Output impedance seen by the load in this emitter follower

I'm trying to understand what the concept of "output impedance" relates in a simple buffer such as an emitter follower conceptually without digging in formulas. Imagine the Rload is about to be ...
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1answer
85 views

Simple circuit- Diode and the output voltage

I have found the current right but I thought 22V-2.2k(4.84mA)-0.7 would be equal to V0 (or 2.2k(4.84mA), voltage from lower branch- both are equal and so no inconsistency), why is my logic wrong and ...
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1answer
61 views

Relay output issues

I am currently working on a project and to that end, i need to switch a 50VAC, 6-7 micro amp input across two outputs with a delay.I used a relay module connected to an arduino to do so. I intended ...
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3answers
353 views

Can I supply a device rated for 1A with 15A power supply? [duplicate]

I'm talking about a big difference between output current of the power supply and rated current of the device here. Would it burn up?
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1answer
607 views

Error: illegal Verilog output port specification

I am having problems with my verilog test bench. Every time I try to run it, I get the error in the title above for my four switch registers. I have searched this question numerous times but I cannot ...
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2answers
773 views

Can any type of op amp output stage be forced into Class A operation?

I'm trying to choose a good op amp for a Class A small signal audio amplifier circuit. I've done my research and understand the use pull up or pull down resistors externally to force Class A ...
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1answer
117 views

What does “LB” out mean in a DC-DC buck converter?

Teacher gave me a schematic,and it includes a DC/DC buck converter with "LB" input and output,but i have no idea what the "LB" is,so i want to ask that does someone know what may the "LB" be?
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2answers
68 views

Transimpedence amplifier output from 0 to 3V

I have this circuit configuration using the Lm324an op amp with a 5V rail (needs to be 5V) an infrared led and a photodiode. At the minute using a using a 1M resistor the output swings to rails when I ...
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1answer
516 views

Formula for BJT common emitter output characteristics curve

I collected experimental data of input and output characteristics of a BJT NPN in Common Emitter configuration. I need to find the right function to fit the Ic vs Vce, but I'm not finding it. I've ...
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3answers
112 views

Why do two different ICs have wildly different high level output voltages?

I have two ICs on a breadboard (74ls374 D type flipflop and 74ls04 hex inverter) and I have an arduino measuring the voltage on the respective output pins of those ICs. The outputs are both at a logic ...
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3answers
986 views

What decides that an IC will be able to sink or source current?

Correct me if I am wrong but so far, I've learnt that some ICs can source current while some can only sink (open-collector) while others can do both. And it is decided by looking at the datasheet, Ioh ...
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1answer
73 views

My analog sensor outputs .5 to 4.5VDC. How do you convert to analog 0-10VDC?

My analog sensor outputs .5 to 4.5VDC. How do you convert to analog 0-10VDC or 1-9VDC?
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1answer
219 views

Tristate driver I/O for analog signals

In FPGAs a tristate drive is used to convert a pin from an input to an output or vice versa. Now this works only in digital circuits. Is there a way how you could obtain the same functionality of ...
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2answers
74 views

Analysing an op-amp circuit and I do not understand a specific resistor value

Hi was reading this article and I read: There is written: Here, the feedback resistor Rf provides a discharge path for capacitor Cf, while the series resistor at the non-inverting input Rn, when of ...
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2answers
84 views

What would the output impedance be if R5 And R6 were not in the circuit?

If R5 = R6 = 10 ohms then I think that the output impedance would be 10 ohms. What would it be if R5 and R6 were not in the circuit? Thanks
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1answer
118 views

How would you calculate the input and output impedance of this amplifier?

How would you calculate the input and output impedance of this amplifier? I have done a lot of research and found so many conflicting pieces of information. Not sure what is right. C1 = 10Uf, C2 = ...
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6answers
7k views

Simplest, cheapest, fast and minimum footprint current limiting circuit with low resistance in normal state

I have a digital output, driven by the high-side driver with nominal voltage of 24V DC. The load current normally is below 100 mA. The output is monitored, so I can switch it off quickly if I detect a ...
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1answer
502 views

Is it necessary to integrate the output voltage of Rogowski Coils, but not the output voltage of current transformers?

I have researched how Rogowski Coils works, and I have seen the integrator circuit at the output of the coil, I have seen the waveforms, done the math, I know that it's necessary to integrate the ...
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1answer
469 views

How can I increase amplitude without affecting frequency accuracy? [closed]

I have generated a variable frequency generator which generates frequency from 0 to 10kHz, with the amplitude of 4.8-5.2 V. How can I increase the amplitude up until 8V without affecting the accuracy ...
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1answer
3k views

in SPI, can MOSI and MISO be connected together?

I'm using an 8051 series microcontroller, and documentation states that if I use serial mode 0, then its RXD pin can function as a bi-directional pin (both input and output) while TXD is strictly a ...
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2answers
533 views

Clipping Class-AB Output

This assignment we have been given has been causing me major headaches. I feel like I'm finally close to getting this amp to work after hours of fiddling around, but now I've found the output is ...
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1answer
421 views

Method for inductance measurement of iron core vacuum tube audio output transformers

I am involved in the direct measurement of inductance of vacuum tube audio output transformers. Inductance levels vary from around 1 H to 50 H for the primary and down to just a few mH on the ...
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3answers
441 views

adding a “power output button” to a cheap bench power supply

I've an old and cheap Atten TRP3005T Take a look at atten site I have seen more expensive device that had a specific button that always disable the current emission every time you power off the ...
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1answer
120 views

Switch between two outputs on a timer

I am new to electronics and have used flashing LEDs with chips built into them before now, but this time I am going to be using 8 LEDs total, and want them to stay in sync. I want to have a setup ...
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1answer
264 views

Can I use a similar AC adapter with different input but the same output?

I have a landline telephone from Japan. The owners manual says only use OUR AC adapter, {Input 100v 50/60Hz 8VA - Output DC 11V 430mA} I want to use this in North America - can I use a AC adapter ...
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2answers
712 views

Is the dynamic resistance ignored in this output impedance formula?

Does the following tutorial neglect the dynamic resistance across the base and the emitter in derivation of the output resistance:? It assumes Vbe constant and ignores the dynamic resistance? But ...
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0answers
76 views

Verilog code indetermination [duplicate]

i have a problem with this code, because in the RTL simulation, the output Cookie appears as StX. I don't know why this is happening since i don't know verilog well. Can someone help me? ...
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0answers
128 views

Is there any reason some pins don't not work as GPIO on ATmega?

I got an ATmega8515 and this simple code inside main(): void main(void) { DDRD = 0xFF; PORTD = 0xFF; while(1){} } I expect to see all the pins high, ...
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1answer
402 views

MAX5033CASA DC-DC converter not providing correct output voltage

I'm using MAX5033CASA DC-DC converter to generate 12V/500mA from a 48V voltage. My schematic is attached to the message. The inductor I'm using is DO5022P-334MLD. The input voltage to the converter ...
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0answers
157 views

Diode populated keyboard matrix: Wire two separate buttons to the same output?

I have an encoder board for a 16x8 row/column switch matrix. An absolute beginner to electronics but using all of the great online resources for research the best I can. However, occasionally it turns ...
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1answer
635 views

Output capacitor size for Boost converter under pulsed load

I have a load driven at 24VDC that draws very high current for a short period of time. The following picture is the output of a current amplifier, it reads 2A/V, meaning I have to deal with roughly a ...
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1answer
153 views

CE amplifier circuit gives output voltage that is not completely out of phase

This is the circuit that I have constructed But it fails to give the output voltage that is completely inverted (out of phase) Can anyone show me whats wrong with the circuit?
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204 views

Power supply unit with two negative and positive outputs

So I am trying to add a power supply unit, which takes one input and supposed to provide one output: IN: 85-265V AC OUT:12V DC; 25A (max output power 300W) However, when I look at it, it clearly ...
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1answer
209 views

PCM1804 Output distorted

I am using an TI PCM1804 to convert my audio signal. The PCM1804 is configured as follows: Master Mode, with 12.288MHz input clock Sample rate: 48kHz The testsignal is a 440Hz sine with an amplitude ...
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2answers
391 views

Video generation with Shift Register

Im building a homebrew 8 bit computer and having some problems with video output. I want to know if its possible to generate high resolution, say 640x480, monochrome video output, PAL or NTSC, using ...

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