Invention Grant
US08427352B2 A/D converter circuit including pulse circulation circuit with delay units coupled together in ring shape
有权
A / D转换电路包括具有以环形耦合在一起的延迟单元的脉冲循环电路
- Patent Title: A/D converter circuit including pulse circulation circuit with delay units coupled together in ring shape
- Patent Title (中): A / D转换电路包括具有以环形耦合在一起的延迟单元的脉冲循环电路
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Application No.: US13233272Application Date: 2011-09-15
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Publication No.: US08427352B2Publication Date: 2013-04-23
- Inventor: Yukihiko Tanizawa
- Applicant: Yukihiko Tanizawa
- Applicant Address: JP Kariya
- Assignee: Denso Corporation
- Current Assignee: Denso Corporation
- Current Assignee Address: JP Kariya
- Agency: Posz Law Group, PLC
- Priority: JP2010-216767 20100928; JP2011-091439 20110415
- Main IPC: H03M1/60
- IPC: H03M1/60
Abstract:
An A/D converter circuit includes first to fourth pulse circulation circuits and first and second counters and configured to provide high conversion accuracy irrespective of a temperature change. The first pulse circulation circuit operates with a difference voltage of a specified voltage and an analog input voltage. The first counter outputs a difference of the number of pulse circulation in the first and the second pulse circulation circuits. The third pulse circulation circuit operates with a difference voltage of the specified voltage and a set voltage. The fourth pulse circulation circuit operates with the set voltage. The second counter outputs a difference of the number of pulse circulation in the third and the fourth pulse circulation circuits. When an output value of the second counter reaches a specified value, an output value of the first counter at that time is outputted as A/D conversion data.
Public/Granted literature
- US20120075137A1 A/D CONVERTER CIRCUIT Public/Granted day:2012-03-29
Information query
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