Narrowband RF Power Amplifier (520MHz)

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https://www.electronics-lab.com/narrowband-rf-power-amplifier-520mhz/

The RF power amplifier stage is usually the final active block of any electronic system that is transmitting RF power. Relatively low power RF signals are amplified to produce a more powerful signal in order to be transmitted over greater distance. RF output power can range from a few mW to MW, depend by application. […]

Simple circuit lets you characterize JFETs

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https://www.electronics-lab.com/simple-circuit-lets-you-characterize-jfets/

by John Fattaruso @ edn.com: When working with discrete JFETs, designers may need to accommodate a large variation in device parameters for a given transistor type. A square-law equation is usually used as an approximate model for the drain-current characteristic of the JFET: ID=β(VGS−VP)2, where ID is the drain current, VGS is the gate-to-source voltage, β […]