|  | H |
SECTION H — ELECTRICITY

|  | H03 |
BASIC ELECTRONIC CIRCUITRY

|  | H03B |
GENERATION OF OSCILLATIONS (measuring, testing Fulltext... Hierarchy... Expanded...G01R; generators adapted for electrophonic musical instruments Fulltext... Hierarchy... Expanded...G10H; masers, lasers Fulltext... Hierarchy... Expanded...H01S; dynamo-electric machines Fulltext... Hierarchy... Expanded...H02K; power inverter circuits Fulltext... Hierarchy... Expanded...H02M; details applicable both to generators of sinusoidal oscillations and to generators of non-sinusoidal oscillations Fulltext... Hierarchy... Expanded...H03K; generations of substantially non-sinusoidal oscillations Fulltext... Hierarchy... Expanded...H03K; generations of sinusoidal or non-sinusoidal oscillations at will Fulltext... Hierarchy... Expanded...H03K; generation of oscillations in plasma Fulltext... Hierarchy... Expanded...H05H)

|  | H03B |
Note(s) This sub-class deals with (a) generation of substantially sinusoidal oscillations directly or by frequency-changing, (b) regulation of generator output, (c) synchronisation of generator output and (d) generation of noise currents or voltages.

|  | H03B 1/00 |
Details

|  | H03B 1/02 |
· | Structural details of power oscillators, e.g. for heating

|  | H03B 1/04 |
· | Reducing undesired oscillations, e.g. harmonics

|  | H03B 3/00 |
Regulation; Synchronisation; Arrangements for supplying a predetermined amount of energy (modification of specific types of generator Fulltext... Hierarchy... Expanded...Fulltext... Hierarchy... Expanded...H03B 5/00-H03B 23/00)

|  | H03B 3/02 |
· | Regulation of amplitude

|  | H03B 3/04 |
· | Regulation or synchronisation of frequency or phase (frequency or phase discriminators Fulltext... Hierarchy... Expanded...H03D; turning resonant circuits Fulltext... Hierarchy... Expanded...H03J)

|  | H03B 3/06 |
· · | Synchronisation of the frequency or phase of a free-running generator with a signal of the same frequency applied directly to the generator; Phase locking

|  | H03B 3/08 |
· · | for synchronising the generator to a desired one of a number of predetermined frequencies, e.g. harmonically-related frequencies; for adjusting the local oscillator of a receiver to a desired one of a number of predetermined frequencies

|  | H03B 3/10 |
· · | for regulating the mean frequency of a frequency modulated generator

|  | H03B 3/12 |
· · | by comparison with a reference frequency determined by energy levels of molecules, atoms, or subatomic particles

|  | H03B 3/14 |
· | of power output

|  | H03B 3/16 |
· · | by varying the degree of coupling between generator and load

|  | H03B 3/18 |
· | Arrangements for supplying a predetermined amount of energy from generator to a load, e.g. within a predetermined time

|  | H03B 5/00 |
Generation of oscillations using amplifier with regenerative feedback from output to input (Fulltext... Hierarchy... Expanded...H03B 9/00, Fulltext... Hierarchy... Expanded...H03B 15/00 take precedence)

|  | H03B 5/02 |
· | Details

|  | H03B 5/04 |
· · | Modifications of generator to compensate for variations in physical values, e.g. power supply, load, temperature

|  | H03B 5/06 |
· · | Modifications of generator to ensure starting of oscillations

|  | H03B 5/08 |
· | with frequency-determining element comprising lumped inductance and capacitance

|  | H03B 5/10 |
· · | active element in amplifier being vacuum tube (Fulltext... Hierarchy... Expanded...H03B 5/14 takes precedence)

|  | H03B 5/12 |
· · | active element in amplifier being semiconductor device (Fulltext... Hierarchy... Expanded...H03B 5/14 takes precedence)

|  | H03B 5/14 |
· · | frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted

|  | H03B 5/16 |
· · · | active element in amplifier being vacuum tube

|  | H03B 5/18 |
· | with frequency-determining element comprising distributed inductance and capacitance

|  | H03B 5/20 |
· | with frequency-determining element comprising resistance and either capacitance or inductance, e.g. phase-shift oscillator

|  | H03B 5/22 |
· · | active element in amplifier being vacuum tube (Fulltext... Hierarchy... Expanded...H03B 5/26 takes precedence)

|  | H03B 5/24 |
· · | active element in amplifier being semiconductor device (Fulltext... Hierarchy... Expanded...H03B 5/26 takes precedence)

|  | H03B 5/26 |
· · | frequency-determining element being part of bridge circuit in closed ring around which signal is transmitted; frequency-determining element being connected via a bridge circuit to such a closed ring, e.g. Wien-Bridge oscillator, parallel-T oscillator

|  | H03B 5/28 |
· · · | active element in amplifier being vacuum tube

|  | H03B 5/30 |
· | with frequency-determining element being electromechanical resonator

|  | H03B 5/32 |
· · | being a piezo-electric resonator (selection of piezo-electric material Fulltext... Hierarchy... Expanded...H01L 41/00)

|  | H03B 5/34 |
· · · | active element in amplifier being vacuum tube (Fulltext... Hierarchy... Expanded...H03B 5/38 takes precedence)

|  | H03B 5/36 |
· · · | active element in amplifier being semiconductor device (Fulltext... Hierarchy... Expanded...H03B 5/38 takes precedence)

|  | H03B 5/38 |
· · · | frequency-determining element being connected via bridge circuit to closed ring around which signal is transmitted

|  | H03B 5/40 |
· · | being a magnetostrictive resonator (Fulltext... Hierarchy... Expanded...H03B 5/42 takes precedence; selection of magnetostrictive material Fulltext... Hierarchy... Expanded...H01L 41/00)

|  | H03B 5/42 |
· · | frequency-determining element connected via bridge circuit to closed ring around which signal is transmitted

|  | H03B 7/00 |
Generation of oscillations using active element having a negative resistance between two of its electrodes (Fulltext... Hierarchy... Expanded...H03B 9/00 takes precedence)

|  | H03B 7/02 |
· | with frequency-determining element comprising lumped inductance and capacitance

|  | H03B 7/04 |
· · | active element being vacuum tube

|  | H03B 7/06 |
· · | active element being semiconductor device

|  | H03B 7/08 |
· · · | being a tunnel diode

|  | H03B 7/10 |
· · | active element being gas-discharge or arc-discharge tube

|  | H03B 7/12 |
· | with frequency-determining element comprising distributed inductance and capacitance

|  | H03B 7/14 |
· · | active element being semiconductor device

|  | H03B 9/00 |
Generation of oscillations using transit-time effects [2]

|  | H03B 9/01 |
· | using discharge tubes [2]

|  | H03B 9/02 |
· · | using a retarding-field tube (using klystrons Fulltext... Hierarchy... Expanded...H03B 9/04) [2]

|  | H03B 9/04 |
· · | using a klystron [2]

|  | H03B 9/06 |
· · · | using a reflex klystron [2]

|  | H03B 9/08 |
· · | using a travelling-wave tube [2]

|  | H03B 9/10 |
· · | using a magnetron [2]

|  | H03B 9/12 |
· | using solid state devices, e.g. Gunn-effect devices [2]

|  | H03B 11/00 |
Generation of oscillations using a shock-excited tuned circuit (with feedback Fulltext... Hierarchy... Expanded...H03B 5/00)

|  | H03B 11/02 |
· | excited by spark (spark gaps therefor Fulltext... Hierarchy... Expanded...H01T 9/00)

|  | H03B 11/04 |
· | excited by interrupter

|  | H03B 11/06 |
· · | by mechanical interrupter

|  | H03B 11/08 |
· · | interrupter being discharge tube

|  | H03B 11/10 |
· · | interrupter being semiconductor device

|  | 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, or using super-conductivity effects (galvano-magnetic devices per se Fulltext... Hierarchy... Expanded...H01L 43/00)

|  | H03B 17/00 |
Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator

|  | H03B 19/00 |
Generation of oscillations by multiplication or division of the frequency a signal from a separate source

|  | H03B 19/02 |
· | by varying permeability of magnetic material

|  | H03B 19/04 |
· | by varying dielectric constant of dielectric material

|  | H03B 19/06 |
· | by means of discharge device or semiconductor device with more than two electrodes

|  | H03B 19/08 |
· · | by means of a discharge device

|  | H03B 19/10 |
· · · | using multiplication only

|  | H03B 19/12 |
· · · | using division only

|  | H03B 19/14 |
· · | by means of a semiconductor device

|  | H03B 21/00 |
Generation of oscillations by beating unmodulated signals of different frequencies (frequency changing circuits in general Fulltext... Hierarchy... Expanded...H03D)

|  | H03B 21/02 |
· | by plural beating, i.e. for frequency synthesis

|  | H03B 23/00 |
Generation of oscillations periodically swept over a predetermined frequency range (angle-modulating circuits in general Fulltext... Hierarchy... Expanded...H03C 3/00)

|  | 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 29/00 |
Generation of noise currents and voltages