Patent ID: 8130130
Filing Date: 2012-03-06
Classification: H03K,H03M

Abstract:
1. A comparison circuit comprising: an input circuit made up of a first transistor for receiving a first signal at the gate electrode, and a second transistor for receiving a second signal at the gate electrode; a first current route of which the electric current is controlled by the first transistor according to the voltage of the first signal; a second current route of which the electric current is controlled by the second transistor according to the voltage of the second signal; a latch circuit for amplifying potential difference between a first node within the first current route and a second node within the second current route; a comparative operation control circuit including a first switch for executing supply of high potential or ground potential to the drain of the first transistor, or blocking of supply of high potential or ground potential to the drain, a second switch for executing supply of high potential or ground potential to the drain of the second transistor, or blocking of supply of high potential or ground potential to the drain, and a third switch for executing supply or blocking of supply of ground potential to the first current route and the second current route; and a comparative operation setting circuit for independently controlling supply or blocking of supply of the first switch, the second switch, and the third switch.