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Class Information
Number: 331/94.5PE
Name: Oscillators >
Description:

Sub-classes under this class:

Class Number	Class Name	Patents
331/103	Tube structure forms inductive part of resonant circuit	3
331/104	Transit time oscillator	4
331/105	With parasitic oscillation control or prevention means	40
331/106	With periodoic or repetitious amplitude varying means (e.g., tremolo)	5
331/107R	Solid state active element oscillator	118
331/126	Gaseous space discharge device	2
331/132	Negative resistance or negative transconductance oscillator	31
331/135	Phase shift type	152
331/138	Bridge type	10
331/143	Relaxation oscillators	308
331/154	Electromechanical resonator	67
331/165	Shock excited resonant circuit	17
331/167	L-c type oscillators	229
331/172	With synchronizing, triggering or pulsing circuits	109
331/175	Frequency stabilization	400
331/177R	With frequency adjusting means	736
331/182	Amplitude control or stabilization	46
331/184	Having discharged device or particular construction	9
331/185	With particular source of power or bias voltage	228
331/187	Miscellaneous oscillator structures	26
331/1R	Automatic frequency stabilization using a phase or frequency sensing means	210
331/37	Beat frequency	45
331/44	With frequency calibration or testing	212
331/45	Polyphase output	184
331/46	Plural oscillators	195
331/57	Ring oscillators	997
331/58	Plural functions simultaneously	4
331/59	Convertible (e.g., oscillator to amplifier, etc.)	21
331/60	Single oscillator with plural output circuits	86
331/62	With oscillator circuit protective means	17
331/63	Protective of safety devices for personnel	3
331/64	With indicator, signal, or alarm	65
331/65	With device responsive to external physical condition	364
331/67	With electromagnetic or electrostatic shield	34
331/68	With outer casing or housing	137
331/70	With temperature modifier	31
331/71	Raw a.c. used as source of power or bias	5
331/72	Electron-coupled type	0
331/74	Combined with particular output coupling network	421
331/78	Electrical noise or random wave generator	250
331/79	Beam tube	35
331/86	With magnetically controlled space discharge device (e.g., magnetron)	38
331/92	Retarding field tube-type oscillators (e.g., barkhausen kurz)	0
331/94.1	Molecular or particle resonant type (e.g., maser)	125
331/95	Butterfly resonator	0
331/96	With distributed parameter resonator	393
331/DIG.2	Phase locked loop having lock indicating or detecting means	447
331/DIG.3	Logic gate active element oscillator	114