Wide band and low noise amplifier for metric waves

Details Wide band and low noise amplifier for metric waves Wide band and low noise amplifier for metric waves

1988-03-17

1989-08-01

Wan, Gene

Amplifiers

With semiconductor amplifying device

Including signal feedback means

330149, H03F 134

Patent

active

048536520

ABSTRACT:
A wide band low noise amplifier for metric waves, including a transistor connected by its emitter to the ground of the amplifier through two secondary windings, connected in series, of a first and second transformer, and coupled between its base and its emitter by the primary winding of the first transformer, one end of the primary winding of the second transformer being connected to the collector of the transistor, the output signal of the amplifier being taken from all or part of the primary of the second transformer and the number of turns of the secondaries of the transformers being very low so as to limit the leak inductance, which amplifier further comprises a first resistor connected in series with the two secondary windings and a second resistor connected between the output of the amplifier and the transistor base.

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