Amplifiers – With semiconductor amplifying device – Including gain control means
Patent
1983-07-25
1985-06-11
Mullins, James B.
Amplifiers
With semiconductor amplifying device
Including gain control means
330 86, 330149, 333 28T, H03G 916
Patent
active
045231567
ABSTRACT:
A tone control circuit including an amplifier having a continuously adjustable frequency response control for varying the effect of low and high frequency filters upon the amplifier, and incorporating a novel distortion and transient suppression circuit is disclosed. A programmable variable resistance is coupled between an input and an output of said amplifier to attenuate circuit low frequency response while initially varying resistor value in response to a programming distortion/transient control signal. Thereafter, overall amplifier gain is further varied in response to the programming distortion/transient control signal by further adjusting the variable resistor value. Various embodiments of the invention provide both continuous and discrete control of tone and volume responsive to both excessive low frequency signal and transients. The present invention is implemented in both discrete and monolithic embodiments, which include both linear and CMOS technologies.
REFERENCES:
patent: 3500316 (1970-03-01), Brown
patent: 4179669 (1979-12-01), Dodson et al.
Mullins James B.
National Semiconductor Corporation
Pollock Michael J.
Winters Paul J.
Woodward Gail W.
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