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The differential amplifier with low-pass filtering circuit c

2015-01-04 01:56  
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The differential amplifier with low-pass filtering circuit composed of the OPA2604
The differential amplifier with low-pass filtering circuit composed of the OPA2604
The figure shows a low pass filtering differential amplifier circuit. This circuit has the 100 Hz ac low pass filtering, differential input, single-end outputand high fidelity. The OPA2604 amplifier circuit is the mosfet inputdual op-amp integrated circuit. The OPA2604 is connected into two voltage follower. It is shown in figure A1, A2. Because OPA2604 has a very high input impedance (1012 Ω / / 8 pF) and a very low offset current (50 pA), therefore it can ensure the circuit has good filtering effect. The OPA604 is single op-amp and OPA2604 is double op-amp. Both characteristics are completely the same.