Amplifier for use with local oscillators

Details Amplifier for use with local oscillators Amplifier for use with local oscillators

1983-05-18

1986-04-01

Bookbinder, Marc E.

Telecommunications

Receiver or analog modulated signal frequency converter

Frequency modifying or conversion

455307, 455311, H04B 126

Patent

active

045802904

ABSTRACT:
An amplifier for use with a local oscillator in a frequency converter including a mixer for converting a number of channel frequencies received into a certain band of intermediate frequencies, comprises a circuit for amplifying an oscillation signal from the local oscillator and supplying an amplified signal to the mixer through an output terminal thereof, and a trap circuit composed of distributed constant elements for suppressing the certain range of intermediate frequencies. The distributed constant elements include a first microstrip line connected in series to the output terminal, a second microstrip line connected in series with the first microstrip line, and a third microstrip line connected in parallel to the second microstrip line. The second microstrip line serves as an open stub, and the third microstrip line as a short stub.

REFERENCES:
patent: 2228815 (1941-01-01), Deerhake
patent: 4340975 (1982-07-01), Onishi et al.
patent: 4375699 (1983-03-01), Hallford
patent: 4406020 (1983-09-01), Reindel

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