Pulse width digitizing method and pulse width digitizer...

Details Pulse width digitizing method and pulse width digitizer... Pulse width digitizing method and pulse width digitizer...

2009-12-08

2011-11-15

Wang, Ted (Department: 2611)

Pulse or digital communications

Pulse width modulation

C375S350000, C327S007000, C327S172000

Reexamination Certificate

active

08059708

ABSTRACT:
A pulse width (PW) digitizer comprises a current pump, a capacitor, a quantizer, a feedback controller, and a digital filter. The current pump provides a current signal in response to a PW signal. The capacitor obtains a voltage signal in response to the current signal. The quantizer obtains a digital signal in response to the voltage signal. The feedback controller determines a feedback PW signal in response to the digital signal. The feedback PW signal is fed back to the current pump for controlling the current signal converging to a specific value and controlling the digital signal switching between a first code and a second code. The digital filter counts times that the digital signal indicating the first code/the second code and accordingly obtains the PW of the PW signal.

REFERENCES:
patent: 6590426 (2003-07-01), Perrott
patent: 7432752 (2008-10-01), Lee et al.
patent: 7623600 (2009-11-01), Momtaz et al.

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