Patent ID: 8462034

Claim:
A switching module in a digital-to-analog converter, comprising: a switch driver circuit comprising four switches between differential outputs and a current source, two of the four switches connecting the current source to a first one of the differential output when turned on, the remaining two of the four switches connecting the current source to a second one of the differential outputs when turned on; a synchronizing circuit coupled between a decoder and the switch driver circuit, the synchronizing circuit configured to: receive a first digital signal at a first clock cycle, the first digital signal indicating turning on of a first switch of four switches in the switch driver circuit and turning off of three switches other than the first switch; receive a digital signal at a second clock cycle subsequent to the first clock cycle, the second digital signal indicating turning on of a second switch of four switches in the switch driver and turning off of three switches other than the second switch; and generate, based on the first digital signal, a control signal having four signal elements and representing a synchronized version of the second digital signal having waveforms of the signal elements aligned by a clock signal, the control signal implementing a quad switching scheme for switching the four switches.