Questions tagged [signal]
A signal is a stream of information in the form of a varying quantity. Usually in electronics, signals can be in the form of voltages, currents, or radiated electromagnetic fields.
1,946 questions
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How to correctly bias baseline of signal
I have the below analog circuit supplying signal to Arduino ADC
Op amp being used is op07dp, supplied with +4.9V and -4.55V.
My problem is that the output baseline shifts with amplification. I want ...
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Is there a simple circuit that can generate a tan signal [y = tan(x)] from a sine, square or triangle input signal?
Is there an assortment of inductors, capacitors and resistors that can generate a "tan" signal [y = tan(x)] from a signal generator creating a sine, square or triangle source signal ? The ...
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Signal Level Isolation Transformer Using A Common Mode Choke
I'm working on a DIY project to create an white noise signal generator with a bandwidth from as low as 10Hz, all the way to 1MHz. I'm thinking of using the noisy characteristics of a zener diode ...
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Transmitting signals off PCB in noisy environements
I have a project where I am sending signals from one PCB (1), through a line driver (SN74HC125DR) over a cable to another PCB (2) where it is interpreted by a 74HCT238D. PCB 2 also sends a signal ...
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Is there a right way to connect an antenna to a breadboard setup?
I am currently doing my school project that involves around creating a mesh network using LoRa nodes. I have limited knowledge in signals and systems so I'd really appreciate if you could educate me.
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Averaging an RF signal
I’m trying to understand how RF signal averaging is commonly implemented in electronic measurement or communication devices (e.g. receivers, spectrum analyzers).
Given a complex signal represented by ...
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How can I integrate to smoke trigger signals?
I have a smoke detector that pulls its trigger signal to ground when it detects smoke. I need to integrate this smoke detector trigger signal into a telephone dialing module.
My smoke detector ...
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Op-amp signal differentiator producing an incorrect output
I am currently working on creating a circuit that differentiates an incoming signal and outputs the result. I am using the circuit shown below for use as a low-noise counterpart with the same values ...
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Linear AC voltage to DC 5v or 10v PWM conversion
I have a vehicle with generator style speed signal generator and its output is linear from 0 -30VAC. This signal is used by the Dash mounted speedo without any issue. I now have a mandated requirement ...
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How does a noiseless channel of BW B can transmit a maximum of 2B independent informations per second?
The book by B.P. Lathi mentions this excerpt:
If nyquist rate suggests that the sampling rate should be atleast 2B Hz, shouldn’t the transmission rate be a minimum of 2B independent informations per ...
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Rotary Encoder Signal Distortion [closed]
I'm pretty new to oscilloscopes so I apologize in advance. I'm experiencing significant signal distortion on the rotary encoder output from a linear actuator and this is what the oscilloscope is ...
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Test ARINC 429 receiver with generator
I want to send ARINC 429 message to line receiver HI-8588. I use OWON DGE2035 as generator and Hantek 2042 as oscilloscope. CH1 sends original 32 bits message and CH2 sends same message inverted.
Wave ...
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Is it safe to route an audio signal trace underneath power rails (+15V/-15V) in a tight PCB layout?
I'm working on a compact PCB for a preamp circuit using NE5532 op-amps. Due to space constraints, I’m considering routing an audio signal trace on the bottom layer of the PCB, directly underneath the ...
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Uncertainty principles and signal recovery (Donoho and Stark)
I am trying to reconstruct a signal that has missing samples using the methods proved in the title paper. The paper is readily available (https://web.stanford.edu/dept/statistics/cgi-bin/donoho/wp-...
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Balanced Mic Preamp PCB Layout - Close Traces?
I'm designing a PCB for a microphone preamp with a balanced input. The signal is amplified by around +30 dB and then converted to unbalanced at the output.
This is my first time designing a PCB for a ...
