Telecommunications – Receiver or analog modulated signal frequency converter – Signal selection based on frequency
Patent
1983-12-23
1986-05-20
Ng, Jin F.
Telecommunications
Receiver or analog modulated signal frequency converter
Signal selection based on frequency
455253, 455315, 455341, 330279, 330285, H04B 126, H03G 330
Patent
active
045906130
ABSTRACT:
A common emitter transistor amplifier has a control transistor coupled between its collector and base. The base of the control transistor receives an AGC voltage so that the control transistor varies the base current and hence the gain of the common emitter transistor. The common emitter transistor is used as an RF amplifier in a double conversion television tuner having a doubly balanced first mixer. Varying the gain of the RF stage protects the mixer from overload.
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Ahmed Adel A.
Emanuel Peter M.
Ng Jin F.
Rasmussen Paul J.
RCA Corporation
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