The positive and negative values gain of adjustable amplifier circuit composed of LM107

Published:2011/8/9 2:07:00 Author:Rebekka | Keyword: positive value gain , negative value gain , adjustable amplifier | From:SeekIC

Figure (a) is the differential input switching circuit. The input end of the circuit uses a double-pole double-throw switch S to achieve positive and inverting amplification switch. It also uses four high-precision equivalent resistor R to keep the gain value. It is actually a positive and inverting voltage follower, when the S in N (ie S and the upper part of the figure the two contacts N and N 'on), the same phase follower circuit, the circuit has the following relationship: When S is placed in I and I ', the circuit has the following relationship:



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