| 摘要 |
PURPOSE:To prevent the generation of a glitch without sacrificing rapidity by alternately extracting outputs from two current output type digital/analog converters (DACs) through plural current switches. CONSTITUTION:A DATA signal to be a digital signal consisting of plural bits to be converted is applied to the current output type DAC1, DAC2. Receiving a strobe signal at a fixed timing, the current output type DAC1, DAC2 input the DATA signal alternately and conver the signal into analog current I01, I02. When a select signal SEL for driving respective current switches Q1-Q4 is low, transistors (TRs) Q2, Q3 are OFF and TRs Q1, Q4 are OFF. Thereby, the output current I02 of the DAC2 is extracted from an output terminal pa as a converted output I0. When the select signal SEL is turned to high, the TR Q2, Q3 are turned on, the TR Q1, Q4 are turned off and the output current I01 of the DAC1 is extracted from the output terminal pa as a converted output I0.
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