H
SECTION H — ELECTRICITY
 H03
BASIC ELECTRONIC CIRCUITRY
 H03B
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 (measuring, testing G01R; generators adapted for electrophonic musical instruments G10H; speech synthesis G10L; masers, lasers H01S; dynamo-electric machines H02K; power inverter circuits H02M; by using pulse techniques H03K; automatic control of generators H03L; starting, synchronisation or stabilisation of generators where the type of generator is irrelevant or unspecified H03L; generation of oscillations in plasma H05H)
 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 5/00
Generation of oscillations using amplifier with regenerative feedback from output to input (H03B 9/00, 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 (H03B 5/14 takes precedence)
 H03B 5/12
·  ·  active element in amplifier being semiconductor device (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 (H03B 5/26 takes precedence)
 H03B 5/24
·  ·  active element in amplifier being semiconductor device (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 H01L 41/00)
 H03B 5/34
·  ·  ·  active element in amplifier being vacuum tube (H03B 5/38 takes precedence)
 H03B 5/36
·  ·  ·  active element in amplifier being semiconductor device (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 (H03B 5/42 takes precedence; selection of magnetostrictive material 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 (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 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 9/14
·  ·  and elements comprising distributed inductance and capacitance  [3]
 H03B 11/00
Generation of oscillations using a shock-excited tuned circuit (with feedback H03B 5/00)
 H03B 11/02
·  excited by spark (spark gaps therefor 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 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 non-regenerative frequency multiplication or division of a signal from a separate source (transference of modulation from one carrier to another H03D 7/00)
 H03B 19/03
·  using non-linear inductance  [3]
 H03B 19/05
·  using non-linear capacitance, e.g. varactor diodes  [3]
 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 19/16
·  using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes  [3]
 H03B 19/18
·  ·  and elements comprising distributed inductance and capacitance  [3]
 H03B 19/20
·  ·  being diodes exhibiting charge storage or enhancement effects  [3]
 H03B 21/00
Generation of oscillations by combining unmodulated signals of different frequencies (H03B 19/00 takes precedence; frequency changing circuits in general H03D)  [3]
 H03B 21/01
·  by beating unmodulated signals of different frequencies  [3]
 H03B 21/02
·  ·  by plural beating, i.e. for frequency synthesis  [3]
 H03B 21/04
·  ·  using several similar stages  [3]
 H03B 23/00
Generation of oscillations periodically swept over a predetermined frequency range (angle-modulating circuits in general 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 28/00
Generation of oscillations by methods not covered by groups H03B 5/00-H03B 27/00, including modification of the waveform to produce sinusoidal oscillations (analogue function generators for performing computing operations G06G 7/26; use of transformers for conversion of waveform in ac—ac converters H02M 5/18)  [4]
 H03B 29/00
Generation of noise currents and voltages