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

Introduced: September 1968

Classification Context

Section:: ELECTRICITY
Class:: ELECTRONIC CIRCUITRY
Subclass:: GENERATION OF OSCILLATIONS, DIRECTLY OR BY FREQUENCY-CHANGING, BY CIRCUITS EMPLOYING ACTIVE ELEMENTS WHICH OPERATE IN A NON-SWITCHING MANNER; GENERATION OF NOISE BY SUCH CIRCUITS

Description

H03B covers oscillator and frequency-conversion circuits using active elements (transistors, vacuum tubes, operational amplifiers) operating in linear or analog modes, as opposed to switching operation. This includes LC oscillators, RC oscillators, crystal oscillators, and parametric amplifiers used to generate sinusoidal or other continuous-wave signals at specific frequencies. The class also encompasses noise generation circuits and frequency conversion techniques such as heterodyning and mixing, but excludes digital oscillators, switching-mode converters, and pulse-generation circuits classified under H03K.

Scope Notes

Glossary: Elements that operate in non-switching manner Gain element not driven to saturation; No full swing operation as in digital circuit | Limiting references: Generators adapted for electrophonic musical instruments Masers, lasers Generation of oscillations in plasma

Related Keywords

regulating or synchronising AMPLITUDE of electric oscillationsCIRCUITS for generating sinusoidal oscillationsGENERATION of sinusoidal oscillationsGENERATOR(S) of electronic oscillationsreducing HARMONICS in electric oscillatorsgenerating electric OSCILLATIONSelectric OSCILLATORSregulating or synchronising PHASE(S) of electric oscillationsgenerating oscillations for TELECOMMUNICATION

15 direct subcodes

Child Classifications

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H03B 1/00 Details
H03B 11/00 Generation of oscillations using a shock-excited tuned circuit
H03B 13/00 Generation of oscillations using deflection of electron beam in a cathode-ray tube
H03B 15/00 Generation of oscillations using galvano-magnetic devices, e.g. Hall-effect devices, devices using spin transfer effects, devices using giant magnetoresistance, or using super-conductivity effects
H03B 17/00 Generation of oscillations using a radiation source and a detector
H03B 19/00 Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source
H03B 21/00 Generation of oscillations by combining unmodulated signals of different frequencies
H03B 23/00 Generation of oscillations periodically swept over a predetermined frequency range
H03B 25/00 Simultaneous generation by a free-running oscillator of oscillations having different frequencies
H03B 27/00 Generation of oscillations providing a plurality of outputs of the same frequency but differing in phase, other than merely two anti-phase outputs
H03B 28/00 Generation of oscillations by methods not covered by groups , including modification of the waveform to produce sinusoidal oscillations
H03B 29/00 Generation of noise currents and voltages
H03B 5/00 Generation of oscillations using amplifier with regenerative feedback from output to input
H03B 7/00 Generation of oscillations using active element having a negative resistance between two of its electrodes
H03B 9/00 Generation of oscillations using transit-time effects