Ratio of the unknowns circuit diagram

Published:2011/3/29 20:11:00 Author:Ecco | Keyword: Ratio of the unknowns | From:SeekIC

This circuit is used as the situation of two signals share the same input line, for example, two leds irradiate a single photocell alternately. To measure the ratio of two unknowns, the precision better than 1%. During the period of T1, the input signal is sampled by S2, and storaged in C2, so that to make a comparison with reference voltage, the result of which can be obtained by the amplifier network AFE, added to gain control elements CLM6000. The adjusting signal gain of closed loop is increased, and the denominator of ratio is equal to reference voltage. And the molecular corresponding to T2 multiplied by the same gain, so the output of molecular direct ratio to the needed unknow value B/A .



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