公开(公告)号：DE69018346T2

公开(公告)日：1995-10-12

申请号：DE69018346

申请日：1990-05-29

Applicant: IBM

Inventor： CLEMENT CLAY STUART ,  HO CECIL TZECHOR

IPC: H03M1/08 ,  H03M1/06 ,  H03M1/74 ,  H03M13/00 ,  H03M1/68

Abstract: A push pull digital-to-analog converter circuit configuration improves the signal-to-noise ratio when used in the common bipolar (both positive and negative) mode of operation, thereby improving its absolute accuracy. Digital data is supplied to a data buffer (11) which includes an inverter. The inverter supplies the data to one of a pair of push pull connected DACS (40, 50), referred to as dual DACS (30). The buffer (11) supplies the data to the other DAC without inversion. The outputs (41, 51) of the pair of DACS (40, 50) are combined by an op-amp circuit (60) which takes the two analog outputs from those circuits and combines them while the push pull circuits are opposed so noise is reduced and accuracy of the conversion is enhanced.

公开(公告)号：DE69018346D1

公开(公告)日：1995-05-11

申请号：DE69018346

申请日：1990-05-29

Applicant: IBM

Inventor： CLEMENT CLAY STUART ,  HO CECIL TZECHOR

IPC: H03M1/08 ,  H03M1/06 ,  H03M1/74 ,  H03M13/00 ,  H03M1/68

Abstract: A push pull digital-to-analog converter circuit configuration improves the signal-to-noise ratio when used in the common bipolar (both positive and negative) mode of operation, thereby improving its absolute accuracy. Digital data is supplied to a data buffer (11) which includes an inverter. The inverter supplies the data to one of a pair of push pull connected DACS (40, 50), referred to as dual DACS (30). The buffer (11) supplies the data to the other DAC without inversion. The outputs (41, 51) of the pair of DACS (40, 50) are combined by an op-amp circuit (60) which takes the two analog outputs from those circuits and combines them while the push pull circuits are opposed so noise is reduced and accuracy of the conversion is enhanced.