Amplifier circuit arrangement having two amplifiers with respect

Details Amplifier circuit arrangement having two amplifiers with respect Amplifier circuit arrangement having two amplifiers with respect

1982-07-14

1984-06-05

Mullins, James B.

Amplifiers

With semiconductor amplifying device

Including plural amplifier channels

330110, 455142, H03F 368

Patent

active

044531354

ABSTRACT:
Feed-back paths of amplifiers, such as the alternately-operable AM and FM amplifiers of radio receivers, are interconnected by a first capacitor and earthed by a second capcitor, and each of the paths has a switching transistor for permitting current flow through only the feed-back path of the amplifier which is in operation. The AM amplifier has several stages including a final stage with transistors connected via respective feedback paths to two respective input connections. The FM amplifier is identical except that the component values differ.

REFERENCES:
patent: 3673507 (1972-06-01), Prescott
patent: 3801922 (1974-04-01), Muszkiewicz

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