Patent ID: 7888994

Claim:
A differential to single conversion circuit, comprising: a primary output terminal and an auxiliary output terminal; first and second input terminals; a differential amplifier stage coupled between the input terminals and output terminals, and between first and second supply terminals; a first charging circuit having first and second charging switches coupled between the first and second supply terminals, the first and second charging switches being coupled to each other at a first intermediate node; a second charging circuit having third and fourth charging switches coupled between the first and second supply terminals, the third and fourth charging switches being coupled to each other at a second intermediate node, the fourth charging switch having a lower impedance than the second charging switch; a first buffer circuit coupled between the first and second supply terminals, the first buffer circuit including a first buffer switch coupled between the second supply terminal and the primary output terminal and having a control terminal coupled to the first intermediate node; a second buffer circuit coupled between the first and second supply terminals, the second buffer circuit including a second buffer switch coupled between the second supply terminal and the auxiliary output terminal and having a control terminal coupled to the second intermediate node; a first reset switch coupled between the first input terminal and the primary output terminal; and a second reset switch coupled between the second input terminal and the auxiliary output terminal.