Square wave and sawtooth wave generation circuit composed of the MAM4162

Published:2011/8/23 22:29:00 Author: | Keyword: Square wave, sawtooth wave, generation circuit | From:SeekIC

The square wave and sawtooth wave generation circuit composed of the MAM4162 is as shown in the figure. The linearity of this kind of circuit is higher than 1%, the dynamic range can be 80dB. In the circuit, the voltage controlled current source is composed of the A1, VT1 and R1. The capacitance C1 discharges through the current Ic until the voltage of it is reduced to 1.66V, the comparator A2 outputs the +5V voltage. The current of VT2 charges the capacitance C1 until the voltage of it is 3.33V, the output of A2 closes to the ground level. When the control voltage Uc=1.66V, the output frequency is maximum. You can change the value of R1 and C1 to make it output the expected value, the upper limit frequency is limited by the rise time of A2.



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