SIGNAL ATTENUATOR

A first PIN diode (DR1) is connected to the input side of a tuner (T) at the front end of an FM receiver, in an AC coupled fashion parallel to the tuner (T). A correction inductance (L2) is connected parallel to the first PIN diode (DR1) in an AC coupled fashion. The tuner (T) is connected, at its o...

Full description

Saved in:
Bibliographic Details
Main Author KOSUGA, TADASHI
Format Patent
LanguageEnglish
Published 08.01.1992
Edition5
Subjects
BASIC ELECTRONIC CIRCUITRY
CONTROL OF AMPLIFICATION
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
RESONATORS
TRANSMISSION
Online AccessGet full text

Cover

More Information
Summary:A first PIN diode (DR1) is connected to the input side of a tuner (T) at the front end of an FM receiver, in an AC coupled fashion parallel to the tuner (T). A correction inductance (L2) is connected parallel to the first PIN diode (DR1) in an AC coupled fashion. The tuner (T) is connected, at its output side, parallel to a series-connected circuit of a correction capacitor (C6) and a second PIN diode (DR2). The anodes of the first and second PIN diodes (DR1,DR2) are supplied with an automatic gain control (AGC) voltage. When the AGC voltage varies, the resistances of the first and second PIN diodes (DR1,DR2) vary in a manner to adjust the degree to which the correction inductance (L2) and the correction capacitor (C6) affect the resonance in the tuner.
Bibliography:Application Number: EP19910300040