Digital to analog converter with current steering source for reduced glitch energy error

• Main Authors: GARRITY DOUGLAS A, BRASWELL BRANDT, KABIR MOHAMMAD NIZAM U
• Format: Patent
• Language: English
• Published: 02.06.2015
• Subjects: BASIC ELECTRONIC CIRCUITRY; CODE CONVERSION IN GENERAL; CODING; DECODING; ELECTRICITY

A digital to analog converter including a current steering source and a master replica bias network. The current steering source includes a data current source providing a source current to a source node, a switch circuit operative to steer the source current to a selected one of first and second control nodes based on a data bit, a buffer circuit that buffers the source current between the first control node and a first current output node or between the second control node and a second current output node, and an activation current source provides activation current to the buffer circuit via the first and second control nodes. The master replica bias network replicates biasing of the buffer circuit relative to a replica control node and drives the buffer circuit to maintain the first control node, the second control node and the replica control node at a common master control voltage.