AC voltmeter circuit

Posted on Nov 10, 2015

An operational amplifier, a diode bridge rectifier and DC mA AC voltmeter tables as shown in FIG. The figure, the operational amplifier LM324.

AC voltmeter circuit
Click here to download the full size of the above Circuit.

Ul measured AC voltage is applied to the inverting terminal of the operational amplifier, it has a high input impedance, and because a negative feedback can reduce the feedback loop nonlinear effects, so the diode bridge and the head in the feedback operational amplifier circuit, in order to reduce the effect of non-linear diode itself. I all current flow path across the bridge, its value only Ui / R, related to nothing to do with the bridge and the head parameters (non-linear diode dead zone parameters). Table full head crossing rectified current is proportional to the average measured voltage of Ui. The measured voltage depends on the frequency band and the upper limit of the operational amplifier circuit of rising rates.

Leave Comment

characters left:

New Circuits



Popular Circuits

Phantom Wah for guitarists
Crystal oscillator
USB Battery Charger for AA NiMH and NiCd
12 vdc to 220 vac converter circuits
Digital Temperature monitor with LM5 and AT89C51
Alarm Circuits
OP27 Fixed Gain Transformerless Microphone Preamplifier
Home-Built Pulsed Multiple Gas (PMG) Laser
555 logic test circuit diagram pen