Patent ID: 8854516
Filing Date: 2014-10-07
Classification: H01L,H04N

Abstract:
1. A comparator comprising: a first amplifier; a second amplifier; current mirror connected to the second amplifier; the current mirror circuit including an input transistor whose gate receives a voltage output by the first amplifier or a voltage output by the second amplifier, wherein: the second amplifier includes a first conductivity type transistor whose gate receives an output of the first amplifier, a second conductivity type transistor connected in series with the first conductivity type transistor forming a mirror circuit, an initializing switch disposed between a gate and a drain thereof, and the gate thereof being connected to a capacitor, and an output node being formed at a connection point between the first conductivity type transistor and the second conductivity type transistor; the mirror circuit includes a second conductivity type transistor connected in series with the gate input transistor, a gate thereof being connected to the capacitor in common with the gate of the second conductivity type transistor; and