Coupled gate switch for high impedance load and split power cont

Details Coupled gate switch for high impedance load and split power cont Coupled gate switch for high impedance load and split power cont

1997-12-18

2000-04-25

Gensler, Paul

Wave transmission lines and networks

Coupling networks

Delay lines including long line elements

333164, 333 81A, H01P 118, H01P 122

Patent

active

060549076

ABSTRACT:
A split power control circuit includes a solid state switch and a circuit or circuit element, such as a relatively large resistance or reactance connected between an RF signal line and ground. In order to provide relatively more precise control and thus relatively finer adjustment of the RF signal line, the RF signal line is split into a plurality of branches, with the switched control circuit or element connected to one or more of the branches. In another embodiment of the present invention, a solid state switch and serially connected circuit or circuit element, such as a resistance or reactance, are connected between an RF signal line and ground. The gate terminal of the solid state switch is capacitively coupled to the switch terminal (i.e. drain or source) connected to the RF signal line, forcing the gate bias element to become a fixed, rather than switched, load, thereby minimizing errors due to the gate biasing element and enabling tuning reactances to be used to compensate for such gate loads.

REFERENCES:
patent: 3202928 (1965-08-01), Prior
patent: 4581595 (1986-04-01), Silagi
patent: 5019793 (1991-05-01), McNab
patent: 5066930 (1991-11-01), Morse
patent: 5128639 (1992-07-01), Ueda et al.
patent: 5355103 (1994-10-01), Kozak
patent: 5519349 (1996-05-01), Nakahara
patent: 5541554 (1996-07-01), Stengel et al.

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