The D/A converter dual phase complementary frequency generator circuit

Published:2011/7/23 22:29:00 Author:Seven | Keyword: D/A converter, frequency generator | From:SeekIC

See as the figure, AD7520 is a CMOS 10-bit multi-channel DAC integrated circuit, which can provide with the output current Io1 in forward proportion to the digital input N, it can also provide with the current Io2 in proportion to the (1023-N). Both VT1 and VT2 with wide band dual op-amp LF353 provide with charge current for the capacitors of C1 and C2. When the charge current on C1 and C2 reaches threshold value LEV 2/3VDD, 556 is reset; C1 and C2 are both discharged by the discharging tube in the base plate, and its LEV is reduced to 1/3VDD.



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