OP177

REV. B

–10–

BILATERAL CURRENT SOURCE

The current sources shown in Figure 28 will supply both

positive and negative current into a grounded load.

R5

R4

R2

+1









R5

+ R4

R2

–

R3

R1

R5

+ R4

R2

must

=

R3

R1

PRECISION ABSOLUTE VALUE AMPLIFIER

inputs from microvolts to volts. In this circuit, the signal always

appears as a common-mode signal to the op amps. The

OP177E CMRR of 140 dB assures errors of less than 1 ppm.

See Figure 29.

PRECISION POSITIVE PEAK DETECTOR

polyethylene to minimize dielectric absorption and leakage. The

of the OP41.

PRECISION THRESHOLD DETECTOR/AMPLIFIER

≥ V









*Teflon is a registered trademark of the Dupont Company.

Figure 31. Precision Threshold Detector/Amplifier

Figure 30. Precision Positive Peak Detector