Digital to analog converter and bias circuit therefor

DETAILED DESCRIPTION It is an object of the present invention to solve the problems of the related art.
An object of the present invention is to provide an accurate D/A converter.
Another object of the invention is to provide a high speed D/A converter.
A further object of the invention is to provide a D/A converter which is relatively inexpensive and non-complex.
Still another object of the invention is to provide a D/A converter with low device count and low real-estate usage.
Still another object of the invention is to a high resolution D/A converter.
A further object of the invention to provide a D/A converter with a high S/N (Signal to Noise) ratio.
Another object of the invention is to improve the mismatch.
Another object of the invention is to improve the PSRR against the power supply noise.
An object of the present invention is to reduce the linearity error of a D/A converter.
It is an object of the present invention to provide a D/A converter with substantially no glitches during operation.
Such advantages, objects and features may be realized in whole or in part by a converter comprising an array having a plurality of current cells; at least one decoder for decoding an applied digital data; and a bias circuit for biasing the plurality of current cells, wherein each current cell of the array has a prescribed layout and the array has a group of current cells where each current cell has a reverse orientation of an adjacent current cell in the group.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
The objects and advantages of the invention may be realized and attained as particularly pointed out in the appended claims.