发明授权
- 专利标题: Method and apparatus for digitizing a voltage
- 专利标题(中): 用于数字化电压的方法和装置
-
申请号: US10298332申请日: 2002-11-18
-
公开(公告)号: US06949903B2公开(公告)日: 2005-09-27
- 发明人: Hansjorg Berroth , Arnold Kuner , Hans-Dieter Schondelmaier
- 申请人: Hansjorg Berroth , Arnold Kuner , Hans-Dieter Schondelmaier
- 申请人地址: DE St. Georgen
- 专利权人: ebm-papst St. Georgen GmbH & Co. KG
- 当前专利权人: ebm-papst St. Georgen GmbH & Co. KG
- 当前专利权人地址: DE St. Georgen
- 代理机构: Ware Fressola Van Der Sluys & Adolphson LLP
- 代理商 Milton Oliver, Esq.
- 优先权: DE10163374 20011222
- 主分类号: H03M1/14
- IPC分类号: H03M1/14 ; H03M1/34 ; H03M1/54 ; H02P1/00 ; H02P3/00 ; H02P5/00 ; H02P7/00
摘要:
When digitizing a voltage, a capacitor is charged, through an impedance, to a voltage value (Um) dependent on the voltage to be digitized. The limits of that one of a plurality of voltage ranges in which said voltage value (Um) lies, are ascertained, and the two limits of that voltage range are defined as a first limit and second limit; the voltage at the capacitor is modified to the first limit by a charge modification circuit containing an impedance, and a first time interval needed therefor is identified; the voltage at the capacitor is modified to the second limit; the voltage at the capacitor is modified from the second to the first limit via the charge modification circuit. A seond time interval needed therefor is identified. Based on values of the first time interval and second time interval, a digital value is calculated, which serves as an indication of how much the voltage value (Um) at the capacitor differs from one of said two limits.
公开/授权文献
- US20030117098A1 Method and apparatus for digitizing a voltage 公开/授权日:2003-06-26