| 摘要 |
An AGC amplifier used in a radio transmitter-receiver such as an portable telephone, in which a transistor for amplification is connected in series to a transistor for buffer as in direct current, and a third transistor is connected to the transistor for amplification, or to the transistor for amplification and the transistor for buffer to vary a feed-back quantity by varying a bias at a base or gate of the third transistor so as to vary a gain, thereby preventing a saturation characteristics of the circuit current from changing even In a change of the gain of the amplifier.
|
