The entry low capacitance of MOSFET modern, with two gates, will create negative inverse reaction through a uncoupled source resistor. Applied right this technique allows the creation of a entrance RF stage field with a relatively high dynamic range.

The final amplifier is the power source of every audio installation. Its job is to convert a small alternating voltage into a powerful signal for driving loudspeakers with as little distortion as possible.

VOX is a switch ordered by voice, often used at microphones instead of the classic switch button. The vox described here may be connected to almost any type of audio equipment which has an external speaker for coupling.

NS741 is an integrated circuit, a small power fm transmitter were left and right audio signals can be modulated in FM stereo with multiplexing.
NS741 Description:
It is a small power fm transmitter that allows data transmission RDS (Radio Data System). Incorporated DSP generates stable stereo signal and attachment RDS data.
NS741 applications:
- Wireless microphone
- Cd and portable mp3
- Cell phones