Welcome to our site! EDAboard.com is an international Electronics Discussion Forum focused on EDA software, circuits, schematics, books, theory, papers, asic, pld, 8051, DSP, Network, RF, Analog Design, PCB, Service Manuals... and a whole lot more! To participate you need to register. Registration is free. Click here to register now.
I'm trying to design the carrier frequency of 40KHz using an Oscillator.
The fc goes thru an Amplitude Modulator(MC1496) together with the message frequency, fm. How do i design this 40Khz oscillator ?
You can design an RC or LC oscillator, or obtain the signal by frequency division from a higher frequency oscillator/ microcontroller, if you already use it in your project.
For RC, design a Wien bridge or phase shift oscillator. For LC, the classical types Hartley, Colpitts... . For frequency division use logic circuits. What are the waveform you need, amplitude and frequency stability?
The datasheet for the MC1496 multiplier IC shows a 'scope pic of a sine-wave as the carrier frequency for an AM modulator.
Look at Sine-wave Oscilator Circuit in Google and you will find links to Wien Bridge, Phase-shift and a few other types of sine-wave oscillator circuits.
This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
By continuing to use this site, you are consenting to our use of cookies.
