Band switching circuit tuner

Details Band switching circuit tuner Band switching circuit tuner

1985-02-15

1987-12-01

LaRoche, Eugene R.

Tuners

With switching means

Inductor only modified or substituted by switching

334 60, 455188, H03J 524

Patent

active

047107375

ABSTRACT:
A band switching circuit of a tuner comprises a tuning circuit, a switching diode connected to the tuning circuit, a pair of band switching terminals coupled across the switching diode. A novel transistor is inserted between one of the band switching terminals and one end of the switching diode with one PN junction of the novel transistor opposing in polarity to the PN junction of the switching diode.

REFERENCES:
patent: 3646450 (1972-02-01), Ma
patent: 4189678 (1980-02-01), Sakamoto et al.
patent: 4291290 (1981-09-01), Ijichi et al.
patent: 4607391 (1986-08-01), Matsuda

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