PROGRAMMABLE_TRIANGLE__SQUARE_WAVE_GENERATOR

Published:2009/7/7 1:02:00 Author:May | From:SeekIC

The programmable multiple output generator provides the control signals for data converter ATE. Major performance criteria are simple, interfaces to a number of microprocessor systems, low power con-sumption, stable output timing relationships combined with a minimum of board space. For schematic sim-plicity only, one output circuit is shown in full.The monolithic HS7584 provides four current output DAC's with four quadrant multiplication, individ-ual reference input and a feedback resistor. The digitally controlled integrator's frequency is determined by:C is the value of C1 to C4 andfi is the resistance of the DAC. With the four DACS on a single chip, the resistance matching is good, which results in stable timing relationships of the generator outputs. The out-put of the comparator A2 determines whether the constant current source provided by A3 and A4 is posi-tive or negative.



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