Patent ID: 7463177
Filing Date: 2008-12-09
Classification: H03M

Abstract:
1. A method of designing a digital-to-analog (D/A) converter connected to a voltage generator using voltage drops in a resistor string to generate a plurality of reference voltages forming a monotonic sequence of voltage levels, the D/A converter being one of X D/A converters identically connected in parallel to the voltage generator to generate X analog voltages simultaneously, X being a positive integer, the reference voltages having a variation tolerance of Y percent, Y being a positive number, the resistors in the resistor string having equal resistance values RA, the method comprising: designing a first control circuit for selecting a first arbitrary one of the plurality of reference voltages as a first output, the first control circuit having a series resistance RB when conducting current from the voltage generator to the first output; designing a second control circuit for selecting a second one of the plurality of reference voltages, adjacent in the monotonic sequence to the first one of the plurality of reference voltages, as a second output; and