Bifurcated range stages to increase speed or dynamic range...

Details Bifurcated range stages to increase speed or dynamic range... Bifurcated range stages to increase speed or dynamic range...

2006-06-13

2006-06-13

Phan, Hanh (Department: 2638)

Optical communications

Diagnostic testing

Determination of communication parameter

C398S033000, C398S202000, C398S208000, C398S214000, C356S226000, C356S229000, C250S2140AG, C324S115000, C330S129000, C341S139000

Reexamination Certificate

active

07062168

ABSTRACT:
Multiple stage ranging circuitry for a measuring circuit includes a first ranging circuit that selectively amplifies an input signal by respective amounts according to the magnitude of the input signal thereto, and a second ranging circuit coupled to the output of the first ranging circuit selectively amplifies the output signal from the first ranging circuit by a respective amount according to the magnitude of that output signal to provide a measured output. The multiple stage ranging circuitry increases dynamic range and provides for high speed measurements over that dynamic range.A method of ranging for high speed signal measurements over a wide dynamic range includes directing an input signal to a first ranging stage that responds at one speed to set ranging over a relatively wide variation in input signal magnitudes, and directing the output signal from the first ranging stage to a second ranging stage responsive at a second speed faster than the one speed to set ranging over a relatively narrower range of signal magnitudes to provide for signal measurement.

REFERENCES:
patent: 4329641 (1982-05-01), Ikeda et al.
patent: 4433914 (1984-02-01), Curran
patent: 4774474 (1988-09-01), Beauducel et al.
patent: 4990913 (1991-02-01), Beauducel
patent: 5491548 (1996-02-01), Bell et al.
patent: 5825516 (1998-10-01), Walsh

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