Single adjustment phase resolver with constant amplitude output

Details Single adjustment phase resolver with constant amplitude output Single adjustment phase resolver with constant amplitude output

1983-11-25

1985-03-19

Mullins, James B.

Amplifiers

With control of power supply or bias voltage

With control of input electrode or gain control electrode bias

328155, 307511, H03G 320, G01R 2504

Patent

active

045062315

ABSTRACT:
A single adjustment phase resolver uses common voltage control in a dual inversely tracking bridged-Tee attenuator circuit (21) to provide a variable relative phase displacement between two output signals whose amplitude levels are maintained equal and constant throughout the range of the phase adjustment. The dual bridged-Tee attenuator is implemented using two variolossers wherein the PIN diodes are serially connected in two pairs (51 and 52, 53 and 54) and the pairs are oppositely poled from one another. An automatic gain control circuit (16, 24 and 26) adjusts the input signal level to compensate for a latitude of discrepancy between the inverse tracking variolossers.

REFERENCES:
patent: 4157508 (1979-06-01), Hecken
patent: 4232399 (1980-11-01), Heiter
patent: 4313089 (1982-01-01), Predina
patent: 4379264 (1983-04-01), Lenhardt
patent: 4395687 (1983-07-01), Belohoubek
"This voltage-controlled rf attenuator", Elec. Design 15, Jul. 22, 1971, N. Kada, pp. 66-67.
"Need a PIN-diode attenuator?", Electronic Design 7, Mar. 29, 1977, R. S. Viles, pp. 100-102.
"Complex phasor modulators control amplitude and phase simultaneously", Microwaves & RF, Jul. 1983, J. P. Curtis, pp. 123-124.

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