Free Circuit Diagram

This is a circuit of differential analog switch. This circuit uses  the FM1208 monolithic dual. Here is the circuit: This circuit is ideal choice for an accurate multiplexer because RDS (on) for the monolithic dual tracks at better than ± 1% over wide temperature ranges (-25 to +125°) although it is unusual. [...]

I some cases, a differential input is needed for voltage measurement. Using the only one operational amplifier, you can build an adapter to provide a floating input for your ground-referenced  voltmeter. Use 1% tolerance metal film resistor for R1 and R2.  Adjust VR1 to give zero voltage output when the input probe is [...]

The signal can be converted by piezoelectric films in many ways such as thermal to electrical (temperature sensor), mechanical to electrical (microphone), and electrical to mechanical ( a loudspeaker). The circuit is signal conditioning amplifier for piezofilm sensor which use three op amps and has a high-input-impedance differential charge. Here is the circuit : [...]

If you have a digital voltmeter, or any voltmeter with millivolt resolution and high input impedance, then you can use this temperature-to-voltage adapter circuit to measure room temperature. Here is the circuit’s schematic diagram: Note that the voltage output of this circuit is floating, not referenced to ground. You have to [...]

Twisted-pair wiring is a wiring technique that usually used for in-building data communication. Compared to conventional coaxial-cable, this technique offers substantial cost saving, for video transmission on the same medium. A differential driver is used to launching a baseband camera signal to twisted pair. Twisted pair exhibits a roll-off characteristic that need equalization to [...]

By detecting a voltage drop in resistor connected in series with the battery, we can measure the current flowing in or out  of the battery. A simple differential amplifier do that, but we need both positive supply and negative supply to sense the current in both direction,  the current when charging and discharging the battery. [...]