Darlington Pair Audio Amplifier. Some of the key applications are high and low side switches sensor amplifiers and audio amplifiers. Circuits used in association with light sensor audio amplifiers and power supplies are some common examples of circuits using darlington pair transistors.
The compound pair needs only 625mv vs. Darlington amplifier the emitter follower circuit which was just discussed lacks to meet the requirements of the circuit current gain a i and the input impedance z i. Good examples of these are the tip142 npn and tip147 pnp which are currently available from digikey.
The collectors are connected directly to the rails.
The output transistors do not increase the size of the audio signal. The output transistors do not increase the size of the audio signal. Darlington complementary is the basic order in how the output stage of an amplifier is taught. In order to achieve some increase in the overall values of circuit current gain and input impedance two transistors are connected as shown in the following circuit diagram which is known as darlington configuration.
