Volume controller using encoder

Details Volume controller using encoder Volume controller using encoder

1997-05-02

1999-04-06

Chang, Vivian

Electrical audio signal processing systems and devices

Including amplitude or volume control

With manual volume control

H03G 300

Patent

active

058928359

ABSTRACT:
The volume controller of the present invention does not require a use of an expensive main controller and a quartz oscillator to generate the pulse signals for regulating the volume. The volume controller can handle the noise generated by turning of an encoder and regulates the volume accurately despite the noise. As the volume is increased, a first pulse signal generating circuitry generates pulse signals with an already established width according to the pulse signals of the encoder. As the volume is decreased, a second pulse signal generating circuitry generates pulse signals with already established width according to the pulse signals of the encoder. The first or the second pulse signal generating circuitry will act optionally according to the increase or decrease of the volume. When the first or the second pulse generating means are optional and yet generates the pulse signal, the control means will disconnect the standard terminal of the encoder that is not to be grounded. This will keep the encoder from generating the pulse signal. And the volume removal integrated circuit will regulate the volume according to the pulse signal of the first or the second pulse signal generating circuitry.

REFERENCES:
patent: 5608793 (1997-03-01), Uriya
patent: 5745057 (1998-04-01), Sasaki et al.

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