Patent ID: 7598896
Filing Date: 2009-10-06
Classification: H03M,H04N

Abstract:
1. An A/D converter with a function of noise cancellation of a signal including first and second voltage levels alternately arranged, the first voltage level containing a noise component, the second voltage level containing a significant signal component and a noise component, the significant signal component being superimposed on the noise component, the function of noise cancellation being provided by subtracting the first voltage level from the second voltage level, the A/D converter comprising: amplifying means ( a first capacitor (C a second capacitor (C a comparator ( a D/A converter ( switching means for switching connection of the first and second capacitors to between an input of the amplifying means ( a control section for controlling turning-on and turning-off of the switching means, the switching means changing the connection of the first and second capacitors to between the input of the amplifying means (