From Silicon Labs

The August 23, 1943 issue of LIFE Magazine carried the following letter to the editor: Sirs: In proportion to size these little glass like quartz wafers are perhaps the most remarkable of all the tools science has given to war. When the story of the almost incredible progress in research and manufacture of radio crystals can be told, it will prove to be a tale of one of the war's greatest achievements. No less significant will be the fruit of the advancement to a world at peace where crystals will be the vibrating hearts of most telecommunications equipment. Gerald James Holton, Harvard University, Cambridge, Mass.

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RF Transceivers
RF transceivers are electronic devices that receive and demodulate an RF signal, then modulate and transmit a new signal.
RF Receivers
RF receivers are electronic devices that enable a particular radio signal to be separated from all others being received and converted into a format for video, voice, or data.
RF Amplifiers
RF amplifiers are devices that accept a varying input signal and produce an output signal that varies in the same way, but with larger amplitude.
Oscillators
Oscillators are devices that are used to generate repetitive signals. They produce output signals without an input signal. There are two major types of electronic oscillators: harmonic oscillators and relaxation oscillators. Harmonic oscillators produce sine wave outputs. Relaxation oscillators produce non-sine wave outputs such as square wave, rectangular wave, and sawtooth outputs.

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