Patent ID: 9543907
Date: 2017-01-10
CPC Classifications: H03F,H03G,H03M

Claim:
1. A multiplier comprising: a bias terminal applying a bias current to a first node; a start-up unit connected between the first node and a power terminal and applying an additional current to the first node; a reference voltage generation unit connected between a second node and a ground terminal and maintaining a voltage constantly between the second node and the ground terminal; a discharging unit connected between a third node and the ground terminal and discharging a voltage of the third node; a current offset removal unit connected between the power terminal and the second node and removing a dark current outputted even when light is not incident to a light receiving device; a current signal amplifier unit connected between the power terminal and an output terminal and amplifying a current signal outputted from the light receiving device and outputting the amplified current signal; and a current-voltage selection unit connected to a fourth node and converting the amplified current signal into a first voltage signal according to a conversion signal, wherein the light receiving device is connected to the third node.