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Muting Transistor Attenuator Circuits and the 2SC2878 ...
https://www.electroschematics.com/muting-transistor-attenuator-circuits-2sc2878/
Types of muting circuits Obviously, the function of muting circuits is to mute (kill) the audio signal. This can be done in a number of ways including switches, relay contacts, junction FETs, analog switches and bipolar muting transistors. Switch and relay contacts can be noisy and intermittent due to contact bounce.
Attenuators - All About Circuits
https://www.allaboutcircuits.com/textbook/semiconductors/chpt-1/attenuators/
Summary: Attenuators. An attenuator reduces an input signal to a lower level. The amount of attenuation is specified in decibels (dB). Decibel values are additive for cascaded attenuator sections. dB from power ratio: dB = 10 log10(PI / PO) dB from voltage ratio: dB = 20 log10(VI / VO) T and Π section attenuators are the most common circuit ...
Homemade RCA Attenuator : 5 Steps (with Pictures ...
https://www.instructables.com/Homemade-RCA-Attenuator/
There are very simple gadgets that can be used for audio purposes with great results. These are passive attenuators. They are very simple objects based on a resistive partition housed in male-female RCA connectors and can be used in particular when there are differences in sensivity between the source (CD player, preamp, etc.) and the amplifier.
Audio Attenuator circuit - Page 1 - EEVblog
https://eevblog.com/forum/beginners/audio-attenuator-circuit/
Re: Audio Attenuator circuit. Yes. The audio signals are going through a fixed attenuator where roughly 20% of the voltage goes to the TV. Apparently the source puts out a pretty "hot" audio signal and the circuit knocks it down to a …
Attenuators Electronic Circuits
http://www.discovercircuits.com/A/attenuators.htm
Electronic attenuator- Two low voltage, low power zeners are used to control electronically the level of an audio signal. The attenuation range is from 6 to 58dB for an input current from 0.042 to 77mA corresponding to a control voltage from 2.7 to 7.5V.
L-pad Attenuator - Circuits Geek
https://circuitsgeek.com/tutorials/l-pad-attenuator/
L-pad Attenuator Circuit The equation for the L-pad attenuator circuit connected between two equal impedances ( ZS = ZL ) looking in the direction of the source impedance, ZS will be. To simplify the design of the attenuator, a “K” value can be used in the attenuator equation above to simplify the maths a little.
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