Balanced digital-to-analog converter

Details Balanced digital-to-analog converter Balanced digital-to-analog converter

1995-12-11

1999-03-09

Williams, Howard L.

Coded data generation or conversion

Analog to or from digital conversion

Digital to analog conversion

341118, H03M 166

Patent

active

058806890

ABSTRACT:
A balanced digital-to-analog converter has improved half-wave symmetry and glitch energy due to the use of a pair of single-ended DACs. By subtracting the outputs from a pair of DACs operating 180.degree. out-of-phase, even-order distortion and glitch energy can be cancelled out. When the balanced DAC is employed in a high-speed direct digital synthesizer, the alias second-harmonic, which is the dominant spur, is dramatically decreased without increasing the noise level of the circuit.

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