Simple diagrams circuits - small electronic projects

This is a wide band amplifier cicuit which is suitable for the frequencies between 10MHz and 500MHz. Wide band amplifiers are used in communication receivers, RF measuring equipment and tons of other devices. … วงจร RF Amplifier ขยายสัญญาณช่วงความถี่กว้างมากๆ อ่านต่อ

The problem with amplifying weak radio signals is that you also amplify the noise. What you can receive depends on how much background noise is present, whether it be man made interference or static. In this design the RF signal is first met by a resistive attenuator, this is necessary as strong signals could otherwise [...]

This is a pretty conventional design, using bipolar transistors in a tuned class C circuit. Thanks to the use of two stages, the amplifier can be driven to full power with less than 1 watt driving power, so that a large gain margin results in this transmitter. วงจร RF Amplifier 80W ด้วยทรานซิสเตอร์ C2782 ดูวงจร และ [...]