A filter removes the dc component of the rectified ac, which is then scaled to RMS..
The circuit uses three CA3130 BiMOS op amps in an application sensitive to sub-picoampere input currents...
Teledyne Semiconductor"s Type TSC9402 IC is eminently suitable as an inexpensive current-to-frequency conver..
This RF converter converts amateur TV signals in the 420- to 450-MHz region to VHF channel 3 or 4, allowing reception of those signals on a standard TV receiver. RF amplifier Ql feeds mixer Ml, and Q3 acts as an IF amplifier. ..
Inverters Ula and Ulb form a 20-kilohertz oscillator whose square wave output-further shaped by D2, R4, and R5 and by D3, R6, and R7â€”drives power field-effect transistors Q2 and Q3. The p-channel and n-channel FETs conduct alternately, in al push-pull configuration. When Q2 conducts, the positive charge on Cout forces diode D4 to conduct as well, which produces a positive voltage, determined by zener diode D5, at terminal A.
Converter features eight decades of current range..
This current to voltage converter rely on the very high input impedance of the operational amplifier. The input current (I) is forced through feedback resistor (Rf), and generates an output voltage equal to (-I x Rf)...
Does an analog-to-digital converter cost you a lot if you need
many bits of accuracy and dynamic range? Absolute accuracy
better than 0.1% is likely to be expensive. But a capability
for wide dynamic range can be quite inexpensive.
Voltage-to-frequency (V-to-F) converters are becoming
popular as a low-cost form of A-to-D conversion because
they can handle a wide dynamic range of signals with good
Converting the small output current of a photo-diode transducer
to a fast responding voltage is often challenging. Here
are some ways to use high-speed Current Feedback and
Voltage Feedback op amps to do the job..
This current to voltage converter rely on the very high input impedance of the operational amplifier. The input current (I) is forced through feedback resistor (Rf), and generates an output voltage equal to (-I x Rf). This output voltage is valid for output voltages from rail to rail, namely from -5 to +5 volts in this example...
Transmitters & Receivers
Sensors & Detectors
Low Frequency Amplifiers
Regulated Power Supplies