Patent ID: 6466143
Filing Date: 2002-10-15
Classification: H03M

Abstract:
An NRZ SIN digital to analog converter comprising:a source of reference sine waves; a first SIN digital to analog converter connected to receive said reference sine waves; and an input digital signal a(t), said sine digital to analog converter providing an output proportional to a(t)(1+cos2&pgr;ft); a first delay circuit delaying said input digital signal a(t) by a delay to produce a delayed input signal; a second delay circuit for delaying said reference sine waves; a second SIN digital to analog converter connected to receive a delayed digital signal from said delay circuit, and a delayed sine wave reference signal, and producing a signal proportional to a(t)(âˆ’1âˆ’cos2&pgr;ft); and a combiner circuit for combining first and second signals produced by said first and second digital to analog converters.