Delay difference adjustment circuit and phase adjuster

Details Delay difference adjustment circuit and phase adjuster Delay difference adjustment circuit and phase adjuster

1997-12-05

1999-11-09

Callahan, Timothy P.

Miscellaneous active electrical nonlinear devices, circuits, and

Signal converting, shaping, or generating

Having specific delay in producing output waveform

327236, 327244, 327158, 327292, H03K 513

Patent

active

059822120

ABSTRACT:
There is provided an adjustment circuit which delays a first and a second signal by a desired delay. After the first and the second signal are inputted to the adjustment circuit via a first and a second signal line, respectively, the first and the second signal are exchanged and are inputted via the second and the first signal line, respectively. A detection circuit receives the first and the second signal from the adjustment circuit, and detects the phase differences of these signals, before and after the exchange. The holding circuit holds a first phase difference detected by the detection circuit before the exchange, and holds a second phase difference detected by the detection circuit after the exchange. When the holding circuit holds the first and the second phase difference, a comparison circuit compares these phase differences. A counter counts in accordance with the comparison results of the comparison circuit, and sets the desired delay of the adjustment circuit.

REFERENCES:
patent: 5631591 (1997-05-01), Bar-Niv
patent: 5812626 (1998-09-01), Kusumoto et al.
Patent Abstracts of Japan, 61209370, Sep. 17, 1986, "Skew Correction System.."
Patent Abstracts of Japan, 08088622, Apr. 2, 1996, "Delay Difference Absorbing System."
Patent Abstracts of Japan, 57192133, Nov. 26, 1982, "Automatic Adjusting Device for Skew/Delay."

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