Absolute Value Comparator (CB21598E)

Based on common operational amplifiers, this circuit was found in Texas Instruments documentation. The power supply must be symmetrical.

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FET Preamplfier (NI022E)
This circuit is indicated to operate from high impedance sources as piezoelectric transducers....
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We found this circuit in a Motorola publication from the 70s. The circuit can be implemented with...
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This double bench source has a fixed voltage output and an adjustable voltage output with current up...