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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1answer
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Mathematical function a of an integrator in series with a non inverting op amp
I am trying to understand the circuit given below so I can make a mathematical model of it.
The circuit consists of an integrator with a reference (offset) voltage and a non inverting op amp ...
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4answers
509 views
Why do you suppress the input when finding the output impedance of an opamp circuit?
In most derivations of the output impedance of an (non-ideal) non-inverting opamp circuit, the input terminal is grounded (e.g. page 5/6 here or page 76 here). It also seems to be a common procedure ...
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3answers
77 views
Discrete headphone amplifier output stage
What is the role of R13? I tried simulating this circuit using the Falstad simulator and removing it changed nothing.
It is a circuit from Small Signal Audio Design by Douglas Self, second edition.
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18 views
OrCAD PSpice simulation error
I am currently simulating an LED driver IC whose part number is TLD5045EJ and I am checking the output current at the SW pin for the IC's wide operating i/p voltage range.
I have set the simulation ...
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4answers
121 views
Microcontroller 24V digital output
For a microcontroller generating a 20mA industrial digital output. What kind of setup is best?
I'm considering:
Microcontroller pin driving a low current N-FET to pull a 24V signal to ground. But ...
0
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2answers
95 views
Why is the output of this instrumentation amplifier not constant?
So here's the circuit and output voltage, the model is AD620:
So according to theory (Vout = 49400/49400 +1)*(2-1) ) i should obtain 2V as the output voltage.
Well what i got in LTSpice was a value ...
3
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0answers
90 views
LDO Outputs wrong voltage
I am working with a very low profile LDO, TCR5RG18A and I'm having issues at the regulators output. It's outputting 0.9V which is half its nominated value (nominal value = 1.8V)
The LDO is operated at ...
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0answers
26 views
Capacitive load in inverter
I'm trying to understand the effect of a capacitive load at the output of an inverter.
And how does it affect the output signal when this capacitive load is high and when it is low?
Could anybody ...
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1answer
36 views
Headphones on a line output (vs. headphones output)
I'm designing a device using a DAC (TI PCM 2704 like this one to be precise,) and optionally a headphones amplifier.
I noticed that connecting (32 Ohms, closed-back Beyerdynamic) headphones to the ...
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2answers
31 views
Output state of the AM26LS32AIDR
We are using AM26LS32AIDR in our design, as per the datasheet when input is open/floating, output should be high, but the output is in low state.
We are unable to trace out the issue.
We followed the ...
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0answers
38 views
Output of filter is a pulse sequence
Like I have been advised in this question, I revised and updated the circuit to a more workable model,
but at the end Im getting this output(the blue is the input and the red is the amplified and ...
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0answers
47 views
BJT common emitter output conductance
I constructed in multisim a common emitter circuit from the following diagram
where the lower Keithley is used to supply VBE and the upper Keithley is used to supply VCE.
I obtained the IC- VCE ...
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1answer
41 views
MM74C933N Output-enabled pin
Studying the datasheet of the MM74C922N 4x4 matrix keypad and I am lost on what the output-enabled pin does, its function, and why it is needed. Any help is appreciated.
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1answer
86 views
Voltage across capacitor measured in parallel, why not showing Vc?
I am trying to understand something and missing something. In a low pass RC filter, the output is connected in parallel with the capacitor, right, and is phase shifted, because the current in a RC ...
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1answer
103 views
Why does my output get supercompensated?
I have almost finished a project that was supposed to output a square wave signal with a certain frequency but when I tried to make a small change to the circuit something weird happened to my output.
...
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1answer
82 views
How can I make output voltage bigger for this stabilizer?
For my project I have to design an voltage stabilizer with 5V on input and 3.3V on output.In order to do it , I selected a Zener diode for my reference (D1 and R1) , A divider for negative reaction (...
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1answer
48 views
How to interface MCU with open-collector output?
I have a 3.3VDC microcontroller (based on Nordic nRF52840) with digital inputs which I need to interface to a device that outputs slow pulses (1 second) via an "open collector output".
The ...
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1answer
37 views
Can I margin a synchronous Buck regulator to output all the way from 0V to VIN?
When using a synchronous buck regulator without bootstrap supply for its top MOSFET, it should be possible to margin the output voltage all the way from 0V to VIN by feeding an additional CTRL voltage ...
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1answer
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2answers
78 views
Using ARM or any microcontroller text output [closed]
As you may notice, some microcontrollers have an output in textmode with four pin assigned to send serial data.
In some cases we may need to use this output for finding our problem,without forcing to ...
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1answer
109 views
Choosing an opamp for the amplifier stage of a signal generator (uses AD9833) [closed]
I am currently on a project to make my own signal generator for use in testing circuits etc. I have based it largely on a tutorial here: https://www.allaboutcircuits.com/projects/how-to-DIY-waveform-...
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1answer
72 views
Panasonic RX-DT860 mod, how to unmute audio signal?
I have this older terrific sounding Panasonic Boombox RX-DT860 (huge!) and the laser unit of the CD-player died and cannot replace it. The Boombox also lacks an AUX-input, so time to change it, time ...
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1answer
45 views
How do you find a shift register or output expander that has low pin outputs at power on?
So far I have somewhat successfully used a shift register (74HC595) and an output expander (PCF8574) to control FETs and BJTs. The main drawback so far seems to be that the chips I’m using have ...
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1answer
76 views
What is the output of this VCO?
I am using ROS-43-119+ from Mini-circuits. I need a VCO that can generate a 40MHz frequency.
ROS-43-119+ can generate my required frequency by controlling the tuning voltage.
I need sinewave output ...
0
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1answer
71 views
How do you design a logic circuit diagram, when there are 2 inputs and each input has 2 values?
So I came across this problem, where the conditions of the output (P, Q, R) will be set to high (1) if the condition is true:
The conditions are:
Output P : A > B
Output Q : A = B
Output R : A &...
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1answer
65 views
How to not fry a Raspberry PI while wiring it to a relatively high voltage pin of a frequency inverter?
I'm working with a frequency inverter brand Metaltex type IF20 and a Raspberry PI. With the RPI I'm going to get some digital readings using one of its GPIOs, and for that I'll wire it to a digital ...
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4answers
135 views
How to design this circuit in a simulator? What is wrong? (PSpice)
I am trying to implement this circuit in the PSpice simulator:
I did it like this:
I am getting this result:
I was expecting something different than 0 in the output voltage. Could someone explain ...
2
votes
1answer
62 views
Electrical Voltage Conversion Confusion [closed]
so my friend bought a drumset from America and had it shipped all the way here to Amman, Jordan. Of course im going to need a convertor for the voltage difference between the 2 countries. However I'm ...
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1answer
57 views
Pulse duration detection evaluation (opto) LT-22222 from dragino
My question seems simple but i can't find the answer on documentation. (or I don’t have enough skillz)
I have this energy meter with pulse output:
https://cdn.store-factory.com/www.compteur-energie....
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0answers
70 views
Protection of the pins of an electronic board against overvoltage due to a bad connection
I designed an electronic board with two inputs connected to an ADC (MCP3202), one output connected to the output of an AOP (INA105) and a 24V battery supply.
My question is: is there a way to protect ...
3
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2answers
262 views
How do I calculate sound pressure level (dB SPL) from headphones at a specific setting on my sound card?
I am using headphones with sensitivity 102 dB SPL / 1 Vrms with impedance of 300 ohms. For a particular volume knob setting on my sound card embedded with a headphone pre-amplifier, I would like to ...
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2answers
63 views
PIC16F18446 Tristate output pins controlled by the value of another pin
In many 74xx chips the high impedance state of pins is controlled by a OE pin.
I want a similar functionality for my PIC device.
I understand that I could use code to flip the config bits to make the ...
0
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2answers
59 views
Digital output high voltage specification
I am using the HD74LS14P (Schmitt trigger inverter IC.)
The datasheet show that VOH is 2.7 V (for VCC = 4.75 V.) My IC gives me about 4.5 V when VI=0 V.
I need my IC to give the right value.
I am ...
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2answers
202 views
Is there a way to measure the Phase Shift between the input and the output voltages related by the equation: \$V_o = V_i(a+jb).\$? [closed]
Say \$V_i\$ is an input voltage, and the output voltage is given by \$V_o = V_i(a+jb).\$ Is there a way to measure the Phase Shift between these input and output voltages?
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2answers
36 views
Confusion in proportional controller
I was revising proportional controller from here
and got confused in following figure which is common in many books also.
Since output of controller is proportional(by factor K) to error function but ...
0
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1answer
40 views
How do I convert a switch’s single output into a double output per keypress?
I am new to electronics compared to many here I’m sure, but I have some experience with Arduinos and basic circuits and PCBs. If for example I had two mechanical keyboard switches wired up to an ...
2
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2answers
258 views
Amplitude vs Magnitude
Consider the relation between the output and input voltages: $$V_o=\frac{V_i}{2}(j-1)$$ where j is an imaginary number, and $$V_i=5sin(1000t)$$ Now, to find the amplitude of \$ V_o \$, should we look ...
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1answer
40 views
Question about the methodology of calculating the output resistance of a BJT amplifier
I am trying to analyze the following BJT amplifier. When it comes to calculating the output resistance, the instructor's solution simply says "It's Rout=Rc", possibly assuming that by ...
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1answer
47 views
Different output for recliner power supply safe to use 25V 2.5A to a 29V 2A [duplicate]
My father broke his power supply for his recliner. He's on oxygen 24/7 and I was trying to find out if it was safe to use a slightly different power supply cause I can't find an exact match. The one ...
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0answers
46 views
How to calculate laser power on photodiode?
I am completely lost calculating the power of a laser diode and hope, that someone could help me.
Here is my setup:
OSRAM PL 520 (Type B1 = 50mW) Green Laser Diode
OSRAM SFH 203 Photodiode
The laser ...
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0answers
30 views
Buck Converter Feedback path
I have this buck converter - TPS54260
I was doing this Control Loop Stability test. For this test, we need to place a small 5-10ohm resistor on the resistor divided feedback path of converter Keysight ...
1
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1answer
47 views
How to opto isloate a pin and still use it as either an output or input at will
I am looking for a clever way to merge the two circuits. I want the freedom to configure the pin as input or output but still have the isolation. Not sure if this can even be done but I am for ...
2
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3answers
241 views
Flash ADC's nonlinear output and response
I don't understand this paragraph about flash ADC.
A flash converter can produce a non-linear output which is an additional advantage. The voltage divider network consists of equal-value resistors ...
0
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2answers
69 views
2 dc-dc converters in series? [closed]
I have 2 of theses converters. I am trying to get 48v. Can I connect the outputs in series to achieve this?
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0answers
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How to setup STM32F103C8 encoder triggered output signal
I have a project where I need to read the encoder phase A&B to output the pulse so I can drive a motor, I did some research and saw this picture where it is exactly what I wanted to do:
output a ...
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0answers
39 views
Determining sample rate / bandwidth for a gyroscope with no ODR setting
My understanding is that a sensor's bandwidth should be half it's ODR (the rate at which you sample data). I am working with the BNO055 sensor and trying to get angular velocity from it, which will be ...
0
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2answers
77 views
Find an amplifier voltage output to match my subwoofer rating [closed]
I have two amplifiers with a subwoofer connected to each one and I was wondering how to check what the output wattage to make sure I don't blow my subs. Since they are two exact same pairs, I'll just ...
0
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2answers
85 views
Keyboard USB transform
I want to press a key on my keyboard, for example "a" and a device should take the scan code of the button I pressed and transform it to something else: e.g. "b" or the scan code ...
0
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1answer
40 views
LE33CZ LDO 3.3V regulator output issue
I'm trying to understand why with this very easy schematic, I got with my multimeter:
5.2V between the 5V pin of the USB breakout and GND: OK
0V between the GND of the LDO and the GND of the USB ...
0
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2answers
61 views
How is the output voltage adjusted on this schematic?
This is a schematic of TI's reference design for a 65-W USB Type-C high density active clamp flyback with GaN (PMP21639), which can be found from this reference design page.
The page claims that the ...
