Generation of oscillations using transit-time effects [2]
9
/
01
•
using discharge tubes [2]
9
/
02
•
•
using a retarding-field tube (using klystrons H 03 B 9/04) [2]
9
/
04
•
•
using a klystron [2]
9
/
06
•
•
•
using a reflex klystron [2]
9
/
08
•
•
using a travelling-wave tube [2]
9
/
10
•
•
using a magnetron [2]
9
/
12
•
using solid state devices, e.g. Gunn-effect devices [2]
9
/
14
•
•
and elements comprising distributed inductance and capacitance [3]
11
/
00
Generation of oscillations using a shock-excited tuned circuit (with feedback H 03 B 5/00)
11
/
02
•
excited by spark (spark gaps therefor H 01 T 9/00)
11
/
04
•
excited by interrupter
11
/
06
•
•
by mechanical interrupter
11
/
08
•
•
interrupter being discharge tube
11
/
10
•
•
interrupter being semiconductor device
13
/
00
Generation of oscillations using deflection of electron beam in a cathode-ray tube
15
/
00
Generation of oscillations using galvano-magnetic devices, e.g. Hall-effect devices, or using super-conductivity effects (galvano-magnetic devices per seH 01 L 43/00)
17
/
00
Generation of oscillations using radiation source and detector, e.g. with interposed variable obturator
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
H 03 D 7/00)
19
/
03
•
using non-linear inductance [3]
19
/
05
•
using non-linear capacitance, e.g. varactor diodes [3]
19
/
06
•
by means of discharge device or semiconductor device with more than two electrodes
19
/
08
•
•
by means of a discharge device
19
/
10
•
•
•
using multiplication only
19
/
12
•
•
•
using division only
19
/
14
•
•
by means of a semiconductor device
19
/
16
•
using uncontrolled rectifying devices, e.g. rectifying diodes or Schottky diodes [3]
19
/
18
•
•
and elements comprising distributed inductance and capacitance [3]
19
/
20
•
•
being diodes exhibiting charge storage or enhancement effects [3]
21
/
00
Generation of oscillations by combining unmodulated signals of different frequencies (H 03 B 19/00 takes precedence; frequency changing circuits in general
H 03 D) [3]
21
/
01
•
by beating unmodulated signals of different frequencies [3]
21
/
02
•
•
by plural beating, i.e. for frequency synthesis [3]
21
/
04
•
•
using several similar stages [3]
23
/
00
Generation of oscillations periodically swept over a predetermined frequency range (angle-modulating circuits in general H 03 C 3/00)
25
/
00
Simultaneous generation by a free-running oscillator of oscillations having different frequencies
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
28
/
00
Generation of oscillations by methods not covered by groups H 03 B 5/00 to H 03 B 27/00, including modification of the waveform to produce sinusoidal oscillations (analogue function generators for performing computing operations
G 06 G 7/26; use of transformers for conversion of waveform in ac-ac converters H 02 M 5/18) [4]
