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12_BIT_BINARY_2s_COMPLEMENT_D_A_CONVERSION_SYSTEM

2014-11-04 00:56  
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12_BIT_BINARY_2s_COMPLEMENT_D_A_CONVERSION_SYSTEM
The front end of the DAC is configured differentially using dual eight-input IC multiplexer 1H6216 and three LM156 op amps. Following the differential amplifier is the programmable gain stage discussed earlier, with a low-pass filter on the output feeding the IH5110 sample and hold amplifier. The output of the IH5110 is connected to the comparator input, - input LM301, through the internal10-KΩ feedback resistor of the 7541 multiplying d/a converter. The AD7541, along with a ±10-V reference and successive approximation logic, make up the 2's complement a/d converter.