公开(公告)号：US5805095A

公开(公告)日：1998-09-08

申请号：US781252

申请日：1997-01-10

申请人： Scott Robert Humphreys ,  Raymond Louis Barrett, Jr. ,  Lawrence Loren Case

发明人： Scott Robert Humphreys ,  Raymond Louis Barrett, Jr. ,  Lawrence Loren Case

IPC分类号： H03M1/66

CPC分类号： H03M1/66

摘要： A two's complement digital to analog converter (300) is for converting a two's complement binary value to an analog output current, and includes a control circuit (310) which generates controlled value bits, a digital to analog current converter (DACC) (320), and an augmenter (330). The DACC (320) generates a DACC analog current which is a portion of the analog output current and which has an absolute value which is related to the binary value of the controlled value bits. The augmenter (330), which is coupled to a most significant bit of the two's complement binary value, generates a portion of the analog output current by modifying the absolute value of the DACC analog current by a least significant bit current increment when the most significant bit indicates a negative value of the two's complement binary value.

摘要翻译： 二进制补码数模转换器（300）用于将二进制补码二进制值转换为模拟输出电流，并且包括产生受控值位的控制电路（310），数模转换器（DACC）（320） ，以及增强器（330）。 DACC（320）产生作为模拟输出电流的一部分的DACC模拟电流，其具有与控制值位的二进制值相关的绝对值。 耦合到二进制补码二进制值的最高有效位的增益器（330）通过在最高有效位电流增量时修改DACC模拟电流的绝对值来产生模拟输出电流的一部分 位表示二进制补码二进制值的负值。