发明名称 |
Electronic volume control circuit for audio devices |
摘要 |
An electronic volume for effecting a control of an impedance circuit in audio devices or the like includes a variable impedance circuit disposed in a signal transmission path and adapted to vary the impedance in accordance with an electronic control signal. A hold/through gate switchable between a hold state and a through state and adapted to permit, when taking the through state, the input signal to pass therethrough in synchronization with a clock signal of a predetermined period and, when taking the hold state, to hold and deliver the input signal as a control signal to the variable impedance circuit, is connected to a control circuit adapted to vary the input signal supplied to the hold/through gate at a predetermined rate at each time of receipt of the hold/through gate, and a rate changing means is provided for changing the rate of variation of the input signal coming through the hold/through gate.
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申请公布号 |
US4473803(A) |
申请公布日期 |
1984.09.25 |
申请号 |
US19820438939 |
申请日期 |
1982.11.03 |
申请人 |
ALPS ELECTRIC CO., LTD. |
发明人 |
KANEKO, AKIO;KAJIWARA, HITOSHI;NISHIGA, KAZUYA;HAIKAWA, YUKIHIKO |
分类号 |
H03H11/24;H03G3/00;H03G3/02;H03G3/04;(IPC1-7):H03G3/02 |
主分类号 |
H03H11/24 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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