GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER

**Definition:** This place covers:

Generation of oscillations in a non-switching manner, i.e. by harmonic oscillators providing sinusoidal signals.

Generation without frequency changing

by means of amplification and feedback; negative resistance

by means of transit-time tubes; electron-beam tubes

by shock-exciting; Hall effect; radiation source and detectors

Generation with frequency changing

by multiplication or division of a signal

by combining unmodulated signals

Particularities of generated oscillations

Swept-over frequency range; multifrequency; multiphase; noise

**Limiting references (this place does not cover):** - Generators adapted for electrophonic musical instruments -> G10H - Masers, lasers -> H01S - Generation of oscillations in plasma -> H05H

**Glossary:** - Elements that operate in non-switching manner: Gain element not driven to saturation; No full swing operation as in digital circuit