Phase adjuster circuit and phase adjusting method

Details Phase adjuster circuit and phase adjusting method Phase adjuster circuit and phase adjusting method

2006-06-07

2008-09-02

Richards, N. Drew (Department: 2816)

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Phase shift by less than period of input

C327S237000, C327S243000

Reexamination Certificate

active

07420404

ABSTRACT:
A phase adjustor circuit and a phase adjusting method are capable of preventing a phase shift amount from fluctuating even if a frequency of a transmission carrier wave of a sensor signal fluctuates. A chopping wave converter circuit converts a pulse string signal into a chopping wave. A chopping wave amplitude control circuit compares the amplitude value of the chopping wave with an amplitude reference value and outputs an adjustment signal corresponding to a difference between those values to the chopping wave converter circuit. The chopping wave converter circuit changes a slope of the chopping wave according to the adjustment signal to adjust the amplitude value of the chopping wave. As a result, a feedback group is structured, and the amplitude value of the chopping wave is maintained to a constant value according to the amplitude reference value.

REFERENCES:
patent: 60-194820 (1985-10-01), None
patent: 04-168803 (1992-06-01), None
patent: 04-267620 (1992-09-01), None
patent: 05161029 (1993-06-01), None
patent: 10-031032 (1998-02-01), None

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