Here, you can find some links to tutorials for Frequency Synthesizers and Frequency Synthesis Techniques.

By Frequency Synthesizer we usually mean a stable signal generator which can be switced to put out any one of a discrete set of frequencies and whose frequency stability is derived from a standard oscillator. At least three techniques are used for Frequency Synthesis:

  • Direct Synthesis is a popular technique which uses frequency multipliers, frequency dividers and mixers.
  • Indirect Synthesis is based upon phase locked loops (PLLs).
  • Direct Digital Synthesis uses a digital accumulator to produce a staircase sawtooth. A lookup table then changes the sawtooth to a staircase sinusoid and a D-to-A converter provides the analog output.
Op-amps are among the most widely used electronic devices today, being used in a vast array of consumer, industrial, and scientific devices. The following topics cover op-amps basics, history and their applications.
Here are some links to Application Notes for Power Supply.
Start now your journey into the world of Digital Signal Processing (DSP).

Digital Signal Processing is one of the most powerful technologies that will shape science and engineering in the twenty-first century. DSP is everywhere: In image and audio processing, in telecommunications, in radars, in medical science and seismology, in space...