Wednesday, October 26, 2011

RF Amplifier Circuit 10MHz - 500MHz based BFR540

RF Amplifier Circuit 10MHz - 500MHz based BFR540

This is a RF amplifier circuit for 10Mhz - 500Mhz input signal. The RF amplifier is using single power transistor BFR540 as the main component to amplify the input signal. The BFR540 is an NPN silicon planar epitaxial transistor in a SOT23 plastic package. BFR540 featured with high power gain, low noise figure, high transition frequency and have gold metallization ensures excellent reliability.

Wide band amplifiers are used in communication receivers, RF measuring equipment and the many of other devices. The circuit described here uses a state of the art transistor to get maximum performance at high frequencies. The above circuit can be applied as a low noise pre-amplifier circuit because of its low noise characteristics.

You can download the BFR540 datasheet here

About RF Amplifier
An RF power amplifier is a type of electronic amplifier which is utilised to convert a low-power radio-frequency signal into a larger signal of significant power, usually for driving the antenna of a transmitter. It is usually optimized to have high efficiency, high output Power (P1dB) compression, good gain, good return loss on the input and output, and optimum heat dissipation.

The basic applications of the RF power amplifier include driving to another high power source, driving a transmitting antenna, microwave heating, and exciting resonant cavity structures. Among these applications, driving transmitter antennas is most well known.
More explanation about power audio amplifier can be found at
This is a demonstration about 01A RF Amplifier which is build used old tube component to amplify the signal.

Watch the video:

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