Programmable attenuator apparatus employing active FET switching

Details Programmable attenuator apparatus employing active FET switching Programmable attenuator apparatus employing active FET switching

1976-10-29

1978-10-17

Gensler, Paul L.

Wave transmission lines and networks

Attenuators

307237, 330145, 330284, H03H 726

Patent

active

041211839

ABSTRACT:
A high-impedance programmable attenuator utilizing field-effect transistor (FET) switching in both the high-impedance and low-impedance sections. In the high-impedance section, hybrid passive attenuator elements are employed to provide attenuation of electrical signals, and both series and shunt forms of active switching are employed to align the appropriate signal paths. The low-impedance amplifier section includes a FET-switched resistive network.

REFERENCES:
patent: 3796945 (1974-03-01), Feldman et al.
patent: 3898593 (1975-08-01), Qureshi
patent: 3936607 (1976-02-01), Gordon
patent: 4009400 (1977-02-01), Harris et al.
patent: 4014238 (1977-03-01), Southard
Percision Programmable Attenuator, Rathai et al., News From Rhode & Schwarz, vol. 12, 1972.

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