Combination of source is grounded and the emitter follower

The circuit consists of a grounded source and an emitter follower configuration. The source is grounded, and the emitter is combined with a common-collector transistor amplifier. As shown in the figure, VTI is a vibration-grounded field-effect transistor amplifier, while V12 is a common-collector transistor amplifier. If the circuit is not configured with vn, but rather connected directly to a substantial European load RL as the load for VT1, the voltage gain remains relatively low. However, the low output impedance of the emitter follower combination results in a higher voltage gain, which is the primary characteristic of this circuit.

The described circuit employs an emitter follower (common-collector) configuration to enhance voltage gain while maintaining low output impedance. This arrangement is particularly advantageous in applications where a high input impedance and low output impedance are desired, allowing for effective signal buffering. The grounded source configuration helps stabilize the operation of the field-effect transistor (FET) amplifier, ensuring that the input signal is accurately processed without significant distortion.

In this setup, VTI serves as the vibration-grounded field-effect transistor amplifier, which is responsible for initial signal amplification. The common-collector transistor amplifier (V12) then follows, providing additional gain while ensuring that the output remains stable and capable of driving loads with varying impedance characteristics. The circuit's design emphasizes the importance of low output impedance, which facilitates better power transfer to the load and minimizes signal loss.

When connecting the circuit to a substantial load, such as the European load RL, the voltage gain may initially appear limited. However, the emitter follower's characteristics allow for improved performance under load conditions. This is particularly useful in practical applications where the circuit must interact with real-world components that may introduce additional resistance or reactance.

Overall, the combination of a grounded source and emitter follower configuration with a common-collector transistor amplifier creates a robust circuit capable of delivering reliable performance across various applications. The design principles employed ensure that the circuit can effectively manage both signal integrity and power delivery, making it suitable for a range of electronic systems. Combination of source is grounded and the emitter follower The source is grounded and the emitter with Chong device (common-collector transistor amplifier) combination. As show n in FIG, VTI is vibration grounded field effect transistor amplifier, VI2 as common-collector transistor amplifier. If the circuit is not set vn, but to thousands of European load RL directly as VT1 load, the voltage gain is quite small, with the low output impedance of the emitter follower combination, you get a higher voltage gain, which is the main characteristic of the circuit.