Diode bridge switching circuit with high attenuation

Details Diode bridge switching circuit with high attenuation Diode bridge switching circuit with high attenuation

1982-05-14

1985-09-24

Miller, Stanley D.

Electrical transmission or interconnection systems

Nonlinear reactor systems

Parametrons

307256, 307542, 307549, H03K 1754, H03K 508

Patent

active

045434956

ABSTRACT:
A switching circuit is suitable for pulse modulating a high frequency carrier signal. The switching circuit provides little attenuation of the carrier signal while it is in its conductive state, but provides very high electrical isolation while in its non-conductive state so that under these conditions very little signal is allowed to appear at an output terminal. The switching circuit comprises four four-arm diode bridges, two of which are in series in the signal path and the other two of which are connected in shunt. When the two serial diode bridges are conductive, and the two shunt bridges are non-conductive an output pulse is obtained, but when the conductive states are reversed no signal is present at the output. One of the shunt connected diode bridges is associated with a matched impedance which is presented to the source of high carrier frequency signals, while the switching circuit presents a high impedance and this prevents the generation of a standing or reflected wave at the input terminal. Additional diodes are associated with the two series connected diode bridges to further attenuate any high frequency signal which partially breaks through.

REFERENCES:
patent: 3011129 (1961-11-01), Magleby et al.
patent: 3127564 (1964-03-01), Giger
patent: 3277949 (1966-10-01), Walbridge
patent: 3350573 (1967-10-01), Barany
patent: 3449596 (1969-06-01), Milberger et al.
patent: 3602740 (1971-08-01), Kelling

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