Low Capacitance High Impedance Amplifier Circuit Using Transistor

This series-feedback series of compounds give a high input impedance and stable, gain wide-band video amplifier for general purpose applications. This is the figure of the circuit;

 

Circuit source: National Semiconductor Application

Overvoltage Protected Compressor Control Circuit

We can control medium power load, such as AC motors in home appliances, using ACST12 devices. Because of it’s thermal and turn off commutation performances, this device is able to drive an inductive load up to 12 A with no turn if additional snubber. This is the figure of the circuit;

High thermal performances in static and transient modes such as the compressor inrush current or high torque operating conditions of an AC motor also provided by this device. The ACST1210-7 can be driven directly by a MCU through a simple gate resistor as shown in figure below because of it’s low gate triggering current level. [Circuit diagram source: STMicroelectronics Application Note]