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1951-04-24
Control of impedance of semiconductor amplifier circuits
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1999-05-12
Linear gain control amplifier
EP0181146A2
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1986-05-14
Transimpedance amplifier circuit
ES362257A1
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1970-12-01
Ecualizador automatico para sistemas de transmision digi- tal.
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1978-10-10
Circuit for automatic volume compression or volume expansion
GB944682A
(en )
1963-12-18
Improvements in or relating to multi-stage variable-gain transistor amplifiers
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1992-05-19
Frequency equalizer
GB1535560A
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1978-12-13
Automatic control circuitry
FI79004C
(fi )
1989-10-10
Foerstaerkare som innehaoller foerstaerknings distributionsreglering foer kaskadkopplade foerstaerkningssteg.
TW364239B
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1999-07-11
Light transmitting device
US2777994A
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1957-01-15
Level regulating devices for transmission systems for coaxial cables
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1980-01-22
Input level supervisory system for level regulator
EP0322803B1
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1995-03-29
Automatic gain control amplifier for compensating cable loss
US4455535A
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1984-06-19
Frequency characteristic adjusting apparatus
GB1192690A
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1970-05-20
Improvements in or relating to Wideband Transistor Amplifiers with Gain Control
US2231542A
(en )
1941-02-11
Transmission control circuit
US3596198A
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1971-07-27
Volume controller
US4241320A
(en )
1980-12-23
Circuit arrangement for establishing weighting coefficients in an analog-type adaptive equalizer
US3024408A
(en )
1962-03-06
Automatic gain control circuit
SU924871A2
(ru )
1982-04-30
Устройство дл автоматической коррекции амплитудно-частотных искажений в системах передачи
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(en )
1968-06-04
Pilot-controlled regulating apparatus for transmission systems
US2132101A
(en )
1938-10-04
Carrier wave system compensated automatic gain control
JPS57133755A
(en )
1982-08-18
Branch coupling circuit for conference telephone set
JPS6019310A
(ja )
1985-01-31
高周波電力制御回路
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1958-02-18
Variable delay system