Title: Digitizer
Application Number: 200610142398 Application Date: 2006.10.11
Publication Number: 1929016 Publication Date: 2007.03.14
Approval Pub. Date: Granted Pub. Date:
International Classifi-cation: G11B20/10;G11B7/004;H03M1/12
Applicant(s) Name: VIA Tech Inc. Address:
Inventor(s) Name:
Attorney & Agent: huangxiao lin wangzhi sen
Abstract:
    A digitizer and a related charge pump are provided. The charge pump includes an input coupled to the output of the comparator and receiving the output of the comparator as a control signal of charging and discharging, three current sources, and three switches, each of which having an end coupled to one of the current sources and another end selectively coupled to one of the differential outputs of the charge pump according to the output signal of the comparator. The charging and discharging currents of the charge pump are essentially identical. Hence there is no need to adopt calibration circuit for calibrating the PN current mismatch.
Time: 13