Pin diode linear attenuator controlled by a companding DAC

Details Pin diode linear attenuator controlled by a companding DAC Pin diode linear attenuator controlled by a companding DAC

1982-03-01

1985-01-15

Gensler, Paul

Wave transmission lines and networks

Attenuators

307540, 307564, H03H 1124

Patent

active

044940840

ABSTRACT:
A companding digital to analog converter (DAC) of a digital input and exponential output is utilized to drive a PIN diode having a logarithmic attenuation characteristic. An RF signal applied to the diode is linearly attenuated by the diode and variably controlled by digital means through the DAC.

REFERENCES:
patent: 3529266 (1970-09-01), King
patent: 3568073 (1971-03-01), McGuffin
patent: 3765020 (1973-10-01), Seager et al.
patent: 3846724 (1974-11-01), Maier
patent: 4019160 (1977-04-01), Kam
patent: 4196381 (1980-04-01), Standing
patent: 4216445 (1980-08-01), Abajian
patent: 4224583 (1980-09-01), Larkin
patent: 4236126 (1980-11-01), Weller et al.
patent: 4300108 (1981-11-01), Shuck et al.
Dowe, Brian, "Recent Op Amp Developments" New Electronics, vol. 13, No. 12 Jun. 10, 1980), pp. 96-100.

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