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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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24 views

How to find the output voltage of a system with a computing amplifier?

I got a question regarding the following system. The only given value is the input voltage $$U_e = 8V.$$ Now the task is to find the output voltage $$U_a.$$ My question now is how do I find this ...
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2answers
47 views

What should be the output resistance of this source with series diode?

Below shows three sources with open terminals: simulate this circuit – Schematic created using CircuitLab In Figure 1 if we want to calculate the output resistance, according to the linear ...
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1answer
56 views

Output problems with lm124 opamp

I am using this circuit to supply current through R1 which is a 50Ohm coil. Opamp is Lm124 supplied as shown in the schematic. Vin is a voltage that can be between 2.5V and 3.5V. Everything works fine ...
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1answer
52 views

LTspice not giving correct output

I'm trying to make a negative voltage power supply, mainly for opamps. I did some googling and found a circuit I like, so naturally before making it, I wanted to simulate it first. It has 12V on the ...
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26 views

What is the effect of the signals in output terminal?

I'm using superposition to solve this problem. I already know that for U1 the output is Ua1=-R/R. Unfortunately I'm not sure what is the output for U2 and U3.
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32 views

PLC Relay Output Circuit

Can someone help with this question? I've answered it to the best of my knowledge based on the learning materials provided but the answers I've gotten are exactly the same as the example. Should 5v be ...
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3answers
119 views

Determining Impedances of an Op-Amp Circuit

I'm trying to review some old concepts, and thus far, there was one that I couldn't really understand: impedance of circuits involving op-amps. Assuming an ideal op-amp, it has infinite input ...
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1answer
26 views

Confusion with output impedance using h parameters

Regarding the below liner circuit model, as far as I understand to find the output impedance the input current Ib is set to zero and the output resistance is calculated as Vc/Ic. I think this way of ...
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2answers
110 views

STM32F103 PC13 on Output mode not work

I using STM32F103C8, I want to use PC13 in GPIO mode (RTC is active). The register ODR13 changes, but the logical value of the PIN does not change. ...
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16 views

Created this Filter Amplifier Circuit; How do I connect this load while maximizing gain?

*Filter Circuit on Left, Load on Right. To give some background, that load is supposed to replicate a long 12V power line (with other stuff on it) on which we will be sending AC signals on. The gain ...
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2answers
31 views

Regulator output current

What is the meaning of output current of the regulator. For example, IC datasheet's written as "300-mA Output Current Capability", the maximum output current must be 300mA, isn't it. What'll happen ...
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2answers
163 views

Output resistance of MOSFET circuit

I am trying to find the output resistance \$Rout\$ of this circuit consisting of 3 n-type MOSFETs. It is given that all 3 MOSFETs have \$g_m=4 mA/V^2\$ and output resistance \$R_o=100k\Omega\$. ...
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1answer
46 views

Electrical isolation in PLC output cards

Every output card spec sheet I read says something about electrical isolation. One I read recently said "Isolated 1500VDC channel to channel". What does isolation mean and what advantages do isolated ...
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1answer
101 views

MOSFET - shorting the gate and source

I am currently in the fourth year of my bachelor's degree and my knowledge on this is really really really very limited, but i got a simulation circuit of an isolated dc-dc converter from my senior ...
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2answers
21 views

designing load for the MCU to drive by output current

I am talking about a plain MCU (ATMega32, max 20 mA per pin) output asserting a logic line high or low. I.e. to drive this IC: http://www.ti.com/lit/ds/symlink/ads114s08b.pdf There is a table ...
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1answer
87 views

What type of outlet is this?

Does anyone know what this outlet is for and why it would be sparking with nothing in it.
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2answers
94 views

Common collector effect of emitter resistor on output impedance

I've been trying to figure out why the expression for output impedance in a common collector configuration contains a parallel Re emitter resistor. Looking at the classic circuit, it looks as though ...
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0answers
142 views

PORTB Interrupt-On-Change in PIC16F887 microcontroller triggering issue

I have a question regarding PIC16F887 internal interrupts. Can PORTB Interrupt-On-Change in PIC16F887 microcontroller be triggered if the PORTB is configured as output port? its Datasheet doesn't ...
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39 views

Bipolar, tristate-able, overvoltage capable, digital output stage?

I need a digital output driver, with 5V TTL input and bipolar output voltages supplied from -10V and +10V rails. It must be able to go to tristate. It must drive about 5mA. In tristate it must survive ...
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99 views

Advantages and disadvantages of voltage output vs. current output PMT modules

Context: I am building a custom right-angle static light scattering setup to measure aggregation of biomolecules in aqueous solution. I need the instrument to be as sensitive as possible, to allow ...
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1answer
50 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
89 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
243 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
408 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
115 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
106 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
177 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
64 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
54 views

Transistor, resistor, capacitor circuit

So I've been having problems trying to find something that will help show me how to put the formulas together for series/parallel resistors, capacitors, and transistors. I have a a simple circuit ...
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0answers
37 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
66 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 ...
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1answer
95 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
124 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
220 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
54 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
431 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
204 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
59 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
49 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
73 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
172 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
202 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
93 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
63 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
198 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
88 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
277 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
53 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
85 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
69 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 ...