On Sunday, 14 April 2019 21:41:59 UTC+1, George Herold wrote:> On Friday, April 12, 2019 at 11:19:04 PM UTC-4, daku...@gmail.com wrote:> > Could some electronics guru here shed some light on this Could a single stage common collector amplifier exhibit amplitude modulation ? > > > > I have the SPICE model of a simple common collector amplifier > > consisting of two base bias resistors, a collector resistor and an input and a output DC blocking capacitor, as well as a source and > > a load resistor of 50.0 Ohm. The BJT collector is connected to Vcc via a RFC coil. I have tried input signal frequencies from 100 MHz > > to 750 MHz, with SPICE transient analysis. Each time, I have seen a > > output signal envelope, at the same spot on the time axis. I have > > tried several common RF|microwave transistors as BFR92A, BFS17, > > BFQ67W and HFA3134, but the bproblem is always there. > > > > All hints and suggestions are welcome - thanks in advance. > > Hmm I'm thinking you need to down load LTspice and post *.asc > schematics. > > George H.or just a sketch NT
Common collector amplifier and amplitude modulation
Started by ●April 13, 2019
Reply by ●April 15, 20192019-04-15