Time delay apparatus and method of using same

Details Time delay apparatus and method of using same Time delay apparatus and method of using same

2002-09-25

2008-11-04

Tra, Quan (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

C327S359000

Reexamination Certificate

active

07446584

ABSTRACT:
Disclosed is a time delay generator200apparatus and method. The apparatus includes a time delay gate212, a mixer216(a Gilbert cell circuit), and a current digital to analog converter206. The mixer216, comprised of first and second transistor differential pairs218and220, receives an analog input signal202without a delay as well as a delayed input signal210produced by the time gate delay. The digital to analog converter regulates the relative current flow between a first control signal232and a second control signal238, effectively altering the mixing of the undelayed input signal208and the delayed input signal210to generate a delayed output signal214with a time or phase delay substantially equal to the temporal delay represented by the digital signal input204. The time delay generator exhibits reduced phase noise and a linear time delay response.

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