UHF Signal Amplifier for TV

This is the circuit diagram of UHF Signal Amplifier for television device. It uses single transistor 2SC3358 as the main signal amplifiication component.

Radio Frequency Modulator Circuit

This is a circuit design diagram of Radio Frequency (RF) Modulator. Due to the power MOSFETs offer high power gain at both audio and radio frequencies, they are will be also very useful in many areas of radio-circuit design. For BF applications, a MOSFET's large safe operating area, VDS vs ID, protects it against damage from reflected RF energy. As a modulator, a MOSFET's transfer linearity aids fidelity. In the suppressed-carrier modulator, an RF signal is applied to the primary of transformer T1, whose secondaries provide equal-amplitude, opposite-phase rf drive signals to output FETs Q1 and Q2.

900MHz RF Amplifier based BFG480W

Circuit Diagram:

This is the circuit diagram of 900MHz RF amplifier built based transistor BFG480W manufactured by Philips. The circuit features low noise, good linearity performance and works well for high frequency application.