Title:
Ａ／Ｄ変換装置
Document Type and Number:
Japanese Patent JP5811153
Kind Code:
B2
Abstract:
An input signal is quantized by a quantizer after being passed through plural loop filters. A last-stage loop filter is formed of an operational amplifier for generating an output signal, a sampling capacitor for sampling the input signal, an integrating capacitor for integrating the signal sampled by the capacitor and plural switches for switching over signal paths. A control circuit controls on/off states of the switches to discharge the sampling capacitor and the integrating capacitor and causes the loop filter to repeat a sampling operation and an integrating operation plural times. The control circuit lastly connects the sampling capacitor and the integrating capacitor to a state, which is opposite to the state of the integrating operation time and turns on a converting switch so that the A/D converter A/D-converts the output signal of the loop filter.
Inventors:
Tomohiro Nezuka
Application Number:
JP2013195433A
Publication Date:
November 11, 2015
Filing Date:
September 20, 2013
Export Citation:
Assignee:
株式会社デンソー
International Classes:
H03M3/02
Domestic Patent References:
| JP4862943B2 | ||||
| JP10508167A |
Foreign References:
| US20050275571 |
Attorney, Agent or Firm:
Patent Business Corporation Sato International Patent Office
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