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 (generators adapted for electrophonic musical instruments G10H; masers or lasers H01S; generation of oscillations in plasma H05H)

Child Classifications

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• H03B 1/00 Details IPC+CPC Available in IPC and CPC
• H03B 11/00 Generation of oscillations using a shock-excited tuned circuit (with feedback H03B5/00) IPC+CPC Available in IPC and CPC
• H03B 13/00 Generation of oscillations using deflection of electron beam in a cathode-ray tube IPC+CPC Available in IPC and CPC
• H03B 15/00 Generation of oscillations using galvano-magnetic devices, e.g. Hall-effect devices, or using superconductivity effects +2 CPC IPC+CPC Available in IPC and CPC
• H03B 17/00 Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator IPC+CPC Available in IPC and CPC
• H03B 19/00 Generation of oscillations by non-regenerative frequency multiplication or division of a signal from a separate source (transference of modulation from one carrier to another H03D7/00) IPC+CPC Available in IPC and CPC
• H03B 21/00 Generation of oscillations by combining unmodulated signals of different frequencies (H03B19/00 takes precedence; frequency changing circuits in general H03D) IPC+CPC Available in IPC and CPC
• H03B 2200/00 Indexing scheme relating to details of oscillators covered by H03B 2nd only +4 CPC CPC only CPC only
• H03B 2201/00 Aspects of oscillators relating to varying the frequency of the oscillations 2nd only +3 CPC CPC only CPC only
• H03B 2202/00 Aspects of oscillators relating to reduction of undesired oscillations 2nd only +8 CPC CPC only CPC only
• H03B 23/00 Generation of oscillations periodically swept over a predetermined frequency range (angle-modulating circuits in general H03C3/00) IPC+CPC Available in IPC and CPC
• H03B 25/00 Simultaneous generation by a free-running oscillator of oscillations having different frequencies IPC+CPC Available in IPC and CPC
• 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 IPC+CPC Available in IPC and CPC
• H03B 28/00 Generation of oscillations by methods not covered by groups H03B5/00 - H03B27/00, including modification of the waveform to produce sinusoidal oscillations (analogue function generators for performing computing operations G06G7/26; use of transformers for conversion of waveform in AC-AC converters H02M5/18) since 1985 IPC+CPC Available in IPC and CPC
• H03B 29/00 Generation of noise currents and voltages IPC+CPC Available in IPC and CPC
• H03B 5/00 Generation of oscillations using amplifier with regenerative feedback from output to input (H03B9/00, H03B15/00 take precedence) IPC+CPC Available in IPC and CPC
• H03B 7/00 Generation of oscillations using active element having a negative resistance between two of its electrodes (H03B9/00 takes precedence) IPC+CPC Available in IPC and CPC
• H03B 9/00 Generation of oscillations using transit-time effects IPC+CPC Available in IPC and CPC