High frequency switching circuit

Details High frequency switching circuit High frequency switching circuit

1997-03-05

1999-03-16

Ton, My-Trang Nu

Miscellaneous active electrical nonlinear devices, circuits, and

Gating

Utilizing three or more electrode solid-state device

333103, 333104, H03K 17687

Patent

active

058835415

ABSTRACT:
A high frequency switching circuitry comprising the following elements. At least one input signal terminal is provided into which an input signal is inputted. An output signal terminal is also provided, from which an output signal is outputted. A first resistive switching circuit is connected between the input signal terminal and a first node. The first resistive switching circuit has first and second signal transmission channels having first and second resistances. The second resistance of the second channel is much higher than the first resistance of the first channel. The first resistive switching circuit switches the first and second signal transmission channels. A first switching element is connected between the first node and the output terminal. A second switching element is connected in series between the first node and a ground line. It is important that the second resistance of the second signal transmission channel of the first resistive switching circuit is almost equal to a difference of an ON-resistance of the second switching element from an impedance of a signal source of the high frequency switching circuitry.

REFERENCES:
patent: 4733203 (1988-03-01), Ayasli
patent: 4837530 (1989-06-01), Kondoh
patent: 5012123 (1991-04-01), Ayasli et al.
patent: 5159297 (1992-10-01), Tateno
patent: 5281928 (1994-01-01), Ravid et al.
patent: 5350957 (1994-09-01), Cooper et al.
patent: 5563557 (1996-10-01), Sasaki

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