Amplifiers – Combined with automatic amplifier disabling switch means
Patent
1995-04-14
1997-09-02
Mullins, James B.
Amplifiers
Combined with automatic amplifier disabling switch means
330297, 381120, H03F 126
Patent
active
056636814
ABSTRACT:
A low frequency amplifier comprising, in series, a first input stage, an intermediate amplifying stage and a final stage. The intermediate amplifying stage comprises a capacitor which is discharged when the amplifier is disabled, and is charged to a predetermined bias value when the amplifier is operative. To prevent voltage peaks at the output of the amplifier during the transient interval between the disabled and operating condition of the amplifier, a second input stage is provided which is only turned on during the transient interval, and is connected to the capacitor to detect its voltage and charge it. During the transient interval, the final stage is disabled. Upon the capacitor reaching the predetermined charge value, the second input stage practically turns itself off, and is then disabled; and, at the same time, the first input stage and the final stage are enabled to turn on the amplifier.
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patent: 4956616 (1990-09-01), Botti
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Botti Edoardo
Chiozzi Giorgio
Carlson David V.
Mullins James B.
Santarelli Bryan A.
SGS--Thomson Microelectronics S.r.l.
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