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Consumer Electronics by S. P. Bali

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ENVELOPE GENERATOR

The timbre gate, when broken down into a block diagram, can be illustrated as shown in Fig. 25.5. It consists of a voltage-controlled amplifier with an audio input and two audio outputs. An envelope generator with adjustable rise, on, and fall times generates the control voltage for the VCA.

 

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Fig. 25.5 Block diagram of a voltage-controlled amplifier with two outputs

 

The envelope generator can be triggered manually or automatically to generate an envelope. The automatic triggering unit furnishes pulses that initiate the envelope. (Sometimes this type of pulse control system is referred to as a clock or a timer circuit). ...

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