Patent ID: 8059708
Filing Date: 2011-11-15
Classification: H03K,H03M,H04L

Abstract:
1. A pulse width (PW) digitizer system, for determining a PW of a PW signal, the PW digitizer system comprising: a sensor, for providing the PW signal; a current pump, for providing a current signal in response to the PW signal; a first capacitor, for obtaining a voltage signal in response to the current signal; a quantizer, for obtaining a digital signal in response to the voltage signal; a first feedback controller, for determining a feedback PW signal in response to the digital signal, wherein the feedback PW signal is selectively fed back to one of the sensor and the current pump, for respectively controlling the PW signal converging to a specific PW and the current signal converging to a specific value and accordingly controlling the digital signal switching between a first code and a second code; and a digital filter, for counting times that the digital signal indicating the first code and times that the digital signal indicating the second code, and accordingly obtaining the PW of the PW signal.