发明授权
US5563597A Switched-capacitor one-bit digital-to-analog converter with low
sensitivity to op-amp offset voltage
失效
开关电容器1位数模转换器,对运放失调电压具有低灵敏度
- 专利标题: Switched-capacitor one-bit digital-to-analog converter with low sensitivity to op-amp offset voltage
- 专利标题(中): 开关电容器1位数模转换器,对运放失调电压具有低灵敏度
-
申请号: US254772申请日: 1994-06-06
-
公开(公告)号: US5563597A公开(公告)日: 1996-10-08
- 发明人: Damien McCartney
- 申请人: Damien McCartney
- 申请人地址: MA Norwood
- 专利权人: Analog Devices, Inc.
- 当前专利权人: Analog Devices, Inc.
- 当前专利权人地址: MA Norwood
- 主分类号: H03M3/02
- IPC分类号: H03M3/02 ; G06G7/186
摘要:
A switched-capacitor DAC system includes an integrator circuit including an op amp having an input lead, an output lead and an integrator capacitor connected between the input lead and the output lead. A sampling switch is operable to connect an input capacitor to be charged by an input voltage during at least one of first and second non-overlapping time intervals, wherein the first time interval is subdivided into first and second non-overlapping sub-intervals and the second time interval is subdivided into third and fourth non-overlapping sub-intervals. A transferring switch is operable to connect the input capacitor to transfer charge from the input capacitor to transfer charge from the input capacitor to the integrator capacitor during at least one of the first and third sub-intervals. A discharging switch is operable to connect the input capacitor to a discharge node during at least one of the second and fourth sub-intervals. In a preferred embodiment of the present invention, the sampling switch connects the input capacitor during one of the first and second sub-intervals, the transferring switch connects the input capacitor during one of the first and third sub-intervals, and the discharging switch connects the input capacitor during one of the second and fourth sub-intervals.
公开/授权文献
- US5055297A Immunopotentiator 公开/授权日:1991-10-08
信息查询