Feedback cascode amplifier

Details Feedback cascode amplifier Feedback cascode amplifier

1990-07-27

1991-05-14

Mottola, Steven

Amplifiers

With semiconductor amplifying device

Including field effect transistor

330294, 330302, H03F 316

Patent

active

050159682

ABSTRACT:
A microwave-frequency feedback amplifier circuit has a cascode amplifier with a first field-effect transistor (FET) having a gate for receiving a signal to be amplified, a source coupled to a reference voltage, and a drain. A second FET has a source coupled to the drain of the first FET, a source coupled to the reference voltage, and a drain. A transformer includes a first inductor with a first terminal coupled to the drain of the second FET and a second terminal for outputting an amplified input signal. A second inductor has a first terminal coupled to the second terminal of the first inductor, and a second terminal coupled to the reference voltage. A feedback circuit couples the drain of the second FET to the gate of the first FET.

REFERENCES:
patent: 4112386 (1978-09-01), Everhart et al.
patent: 4342967 (1982-08-01), Regan et al.
patent: 4658220 (1987-04-01), Heston et al.
John Wiley & Sons, Microwave Circuit Design Using Linear and Nonlinear Techniques, pp. 250 and 252, 1990.

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