What is AC128 transistor?

AC128 transistor is a Germany positive negative-positive (PNP) amplifier with a small signal. It was primarily used in the equipment of guitar effects and amateur radio sets. The AC128 transistor became virtually outdated, as most of the other German's transistors. The middle layer serves as a switch and is known as a base. The other layers are called the emitter and the collector and the supply voltage and the load are connected by means of a connection to the collector and emitter. In the PNP transistor circuit, the collector is always positive with regard to the emitter. This part of the circuit is output. Germania transistor usually turns on when the base voltage exceeds the emitter voltage by 0.25 volts. Requirement for silicon-based transistor 0.5-0.6 volts. Without input to connect the emitter base, the transistor is theoretically turned off. When the input signal applied to the emitter connection exceeds the typical 0.25 V point point, the transistor switches, which allows to flow through a much larger current by the collector's output circuit. This koNfiguration is known as the emitter circuit, as the emitter connection shares both input and output circuits. Other configurations are often used for other types of applications.

One of the problems with the AC128 transistor is the leak current. This current for leakage is the amount of current flowing through the transistor without the input signal used. The excess flow of leakage can produce undesirable noise in the output phases of the circuit, as the transistor will never turn off completely.

The attack current and other AC128 transistors differ from one transistor to another. In districts where two transistors work together, they must be adapted as difficult as possible. This is that they provide the same answer in both parts of the circuit.

corresponding to transistor characteristics require specialized equipment and controlled test environment so that is often tested by the supplier and sold in pairs that have comparablethe properties. Specifications for AC128 can be found on the Internet by searching for part number. The AC128 transistor has become obsolete and is no longer produced, so most suppliers will provide a list of suitable compensation.