Internationale Patentklassifikation

Search
Watch list

IPC version

Language

Display languages

Search criteria

Symbol	Version, Language	Selection

Search in DEPATISnet Search in DPMAregister

Search request: No search request has been comitted.

IPC entry: H03K 3/45 2-dot subgroup [Version 2024.01 (current), Language EN - English]

View options

Definitions

Notes

Subclass indexes

Catchwords

Hierarchy lines

DEKLA groups

Symbol		Title
A		HUMAN NECESSITIES
B		PERFORMING OPERATIONS; TRANSPORTING
C		CHEMISTRY; METALLURGY
D		TEXTILES; PAPER
E		FIXED CONSTRUCTIONS
F		MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
G		PHYSICS
H		ELECTRICITY
H01		ELECTRIC ELEMENTS
H02		GENERATION, CONVERSION, OR DISTRIBUTION OF ELECTRIC POWER
H03		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 (generators specially adapted for electrophonic musical instruments G10H; masers or lasers H01S; generation of oscillations in plasma H05H)
H03C		MODULATION (masers or lasers H01S; coding, decoding or code conversion H03M)
H03D		DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER (masers, lasers H01S; circuits capable of acting both as modulator and demodulator H03C, e.g. balanced modulators H03C 1/54; details applicable to both modulators and frequency-changers H03C; demodulating pulses which have been modulated with a continuously-variable signal H03K 9/00; transforming types of pulse modulation H03K 11/00; relay systems, e.g. repeater stations H04B 7/14; demodulators adapted for digitally modulated-carrier systems H04L 27/00; synchronous demodulators adapted for colour television H04N 9/66)
H03F		AMPLIFIERS
H03G		CONTROL OF AMPLIFICATION
H03H		IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS (measuring, testing G01R; arrangements for producing a reverberation or echo sound G10K 15/08; impedance networks or resonators consisting of distributed impedances, e.g. of the waveguide type, H01P; control of amplification, e.g. bandwidth control of amplifiers, H03G; tuning resonant circuits, e.g. tuning coupled resonant circuits, H03J; networks for modifying the frequency characteristics of communication systems H04B)
H03J		TUNING RESONANT CIRCUITS; SELECTING RESONANT CIRCUITS
H03K		PULSE TECHNIQUE (measuring pulse characteristics G01R; modulating sinusoidal oscillations with pulses H03C; transmission of digital information H04L; discriminator circuits detecting phase difference between two signals by counting or integrating cycles of oscillation H03D 3/04; automatic control, starting, synchronisation or stabilisation of generators of electronic oscillations or pulses where the type of generator is irrelevant or unspecified H03L; coding, decoding or code conversion, in general H03M) [4]
H03K 3/00		Circuits for generating electric pulses; Monostable, bistable or multistable circuits (H03K 4/00 takes precedence; for digital function generators in computers G06F 1/02) [1, 5, 2006.01]
H03K 3/01		. Details [3, 2006.01]
H03K 3/011		. . Modifications of generator to compensate for variations in physical values, e.g. voltage, temperature [6, 2006.01]
H03K 3/012		. . Modifications of generator to improve response time or to decrease power consumption [6, 2006.01]
H03K 3/013		. . Modifications of generator to prevent operation by noise or interference [3, 2006.01]
H03K 3/014		. . Modifications of generator to ensure starting of oscillations [6, 2006.01]
H03K 3/015		. . Modifications of generator to maintain energy constant [6, 2006.01]
H03K 3/017		. . Adjustment of width or dutycycle of pulses (pulse width modulation H03K 7/08) [3, 2006.01]
H03K 3/02		. Generators characterised by the type of circuit or by the means used for producing pulses (H03K 3/64-H03K 3/84 take precedence) [1, 2006.01]
H03K 3/021		. . by the use, as active elements, of more than one type of element or means, e.g. BIMOS, composite devices such as IGBT [6, 2006.01]
H03K 3/023		. . by the use of differential amplifiers or comparators, with internal or external positive feedback [3, 2006.01]
H03K 3/0231		. . . Astable circuits [6, 2006.01]
H03K 3/0232		. . . Monostable circuits [6, 2006.01]
H03K 3/0233		. . . Bistable circuits [6, 2006.01]
H03K 3/0234		. . . Multistable circuits [6, 2006.01]
H03K 3/027		. . by the use of logic circuits, with internal or external positive feedback [3, 2006.01]
H03K 3/03		. . . Astable circuits [3, 2006.01]
H03K 3/033		. . . Monostable circuits [3, 2006.01]
H03K 3/037		. . . Bistable circuits [3, 2006.01]
H03K 3/038		. . . Multistable circuits [6, 2006.01]
H03K 3/04		. . by the use, as active elements, of vacuum tubes only, with positive feedback (H03K 3/023, H03K 3/027 take precedence) [1, 3, 2006.01]
H03K 3/05		. . . using means other than a transformer for feedback [1, 2006.01]
H03K 3/06		. . . . using at least two tubes so coupled that the input of one is derived from the output of another, e.g. multivibrator [1, 2006.01]
H03K 3/08		. . . . . astable [1, 2006.01]
H03K 3/09		. . . . . . Stabilisation of output [2, 2006.01]
H03K 3/10		. . . . . monostable [1, 2006.01]
H03K 3/12		. . . . . bistable [1, 2006.01]
H03K 3/13		. . . . . . Bistables with hysteresis, e.g. Schmitt trigger [6, 2006.01]
H03K 3/14		. . . . . multistable [1, 2006.01]
H03K 3/16		. . . using a transformer for feedback, e.g. blocking oscillator with saturable core [1, 2006.01]
H03K 3/22		. . . . specially adapted for amplitude comparison, i.e. Multiar [1, 2006.01]
H03K 3/26		. . by the use, as active elements, of bipolar transistors with internal or external positive feedback (H03K 3/023, H03K 3/027 take precedence) [1, 2, 2006.01]
H03K 3/28		. . . using means other than a transformer for feedback [1, 2006.01]
H03K 3/281		. . . . using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator [1, 2006.01]
H03K 3/282		. . . . . astable [1, 2006.01]
H03K 3/283		. . . . . . Stabilisation of output [2, 2006.01]
H03K 3/284		. . . . . monostable [1, 2006.01]
H03K 3/286		. . . . . bistable [1, 3, 2006.01]
H03K 3/287		. . . . . . using additional transistors in the feedback circuit (H03K 3/289 takes precedence) [3, 2006.01]
H03K 3/288		. . . . . . using additional transistors in the input circuit (H03K 3/289 takes precedence) [3, 2006.01]
H03K 3/2885		. . . . . . . the input circuit having a differential configuration [5, 2006.01]
H03K 3/289		. . . . . . of the master-slave type [3, 2006.01]
H03K 3/2893		. . . . . . Bistables with hysteresis, e.g. Schmitt trigger [6, 2006.01]
H03K 3/2897		. . . . . . . with an input circuit of differential configuration [6, 2006.01]
H03K 3/29		. . . . . multistable [1, 2006.01]
H03K 3/30		. . . using a transformer for feedback, e.g. blocking oscillator [1, 2006.01]
H03K 3/313		. . by the use, as active elements, of semiconductor devices with two electrodes, one or two potential barriers, and exhibiting a negative resistance characteristic [3, 2006.01]
H03K 3/315		. . . the devices being tunnel diodes [1, 2006.01]
H03K 3/33		. . by the use, as active elements, of semiconductor devices exhibiting hole storage or enhancement effect [1, 2006.01]
H03K 3/335		. . by the use, as active elements, of semiconductor devices with more than two electrodes and exhibiting avalanche effect [1, 2006.01]
H03K 3/35		. . by the use, as active elements, of bipolar semiconductor devices with more than two PN junctions, or more than three electrodes, or more than one electrode connected to the same conductivity region (H03K 3/023, H03K 3/027 take precedence) [1, 3, 2006.01]
H03K 3/351		. . . the devices being unijunction transistors (H03K 3/352 takes precedence) [3, 2006.01]
H03K 3/352		. . . the devices being thyristors [3, 2006.01]
H03K 3/3525		. . . . Anode gate thyristors or programmable unijunction transistors [6, 2006.01]
H03K 3/353		. . by the use, as active elements, of field-effect transistors with internal or external positive feedback (H03K 3/023, H03K 3/027 take precedence) [2, 3, 2006.01]
H03K 3/354		. . . Astable circuits [3, 2006.01]
H03K 3/355		. . . Monostable circuits [3, 2006.01]
H03K 3/356		. . . Bistable circuits [3, 2006.01]
H03K 3/3562		. . . . of the master-slave type [6, 2006.01]
H03K 3/3565		. . . . Bistables with hysteresis, e.g. Schmitt trigger [6, 2006.01]
H03K 3/3568		. . . Multistable circuits [6, 2006.01]
H03K 3/357		. . by the use, as active elements, of bulk negative resistance devices, e.g. Gunn-effect devices [2, 2006.01]
H03K 3/36		. . by the use, as active elements, of semiconductors, not otherwise provided for [2, 2006.01]
H03K 3/37		. . by the use, as active elements, of gas-filled tubes, e.g. astable trigger circuits (H03K 3/55 takes precedence) [1, 2006.01]
H03K 3/38		. . by the use, as active elements, of superconductive devices [1, 3, 2006.01]
H03K 3/40		. . by the use, as active elements, of electrochemical cells [1, 2006.01]
H03K 3/42		. . by the use, as active elements, of opto-electronic devices, i.e. light-emitting and photoelectric devices electrically- or optically-coupled [1, 2006.01]
H03K 3/43		. . by the use, as active elements, of beam deflection tubes [1, 2006.01]
H03K 3/45		. . by the use, as active elements, of non-linear magnetic or dielectric devices [1, 2006.01]
H03K 3/47		. . . the devices being parametrons [1, 2006.01]
H03K 3/49		. . . the devices being ferro-resonant [1, 2006.01]
H03K 3/51		. . . the devices being multi-aperture magnetic cores, e.g. transfluxors [1, 2006.01]
H03K 3/53		. . by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback (H03K 3/335 takes precedence) [1, 2006.01]
H03K 3/537		. . . the switching device being a spark gap [3, 2006.01]
H03K 3/543		. . . the switching device being a vacuum tube [3, 2006.01]
H03K 3/55		. . . the switching device being a gas-filled tube having a control electrode [1, 2006.01]
H03K 3/57		. . . the switching device being a semiconductor device [1, 2006.01]
H03K 3/59		. . by the use of galvano-magnetic devices, e.g. Hall-effect devices [2, 2006.01]
H03K 3/64		. Generators producing trains of pulses, i.e. finite sequences of pulses [1, 2006.01]
H03K 3/66		. . by interrupting the output of a generator [1, 2006.01]
H03K 3/70		. . . time intervals between all adjacent pulses of one train being equal [1, 2006.01]
H03K 3/72		. . with means for varying repetition rate of trains [1, 2006.01]
H03K 3/78		. Generating a single train of pulses having a predetermined pattern, e.g. a predetermined number [1, 2006.01]
H03K 3/80		. Generating trains of sinusoidal oscillations (by keying or interruption of sinusoidal oscillations H03C; for transmission of digital information H04L) [1, 2006.01]
H03K 3/84		. Generating pulses having a predetermined statistical distribution of a parameter, e.g. random pulse generators [2, 2006.01]
H03K 3/86		. Generating pulses by means of delay lines and not covered by the preceding subgroups [2, 2006.01]
H03K 4/00		Generating pulses having essentially a finite slope or stepped portions [1, 2006.01]
H03K 5/00		Manipulation of pulses not covered by one of the other main groups of this subclass (circuits with regenerative action H03K 3/00, H03K 4/00; by the use of non-linear magnetic or dielectric devices H03K 3/45) [1, 2006.01]
H03K 6/00		Manipulating pulses having a finite slope and not covered by one of the other main groups of this subclass (circuits with regenerative action H03K 4/00) [1, 2006.01]
H03K 7/00		Modulating pulses with a continuously-variable modulating signal [1, 2006.01]
H03K 9/00		Demodulating pulses which have been modulated with a continuously-variable signal [1, 2006.01]
H03K 11/00		Transforming types of modulation, e.g. position-modulated pulses into duration-modulated pulses [1, 2006.01]
H03K 12/00		Producing pulses by distorting or combining sinusoidal waveforms (shaping pulses H03K 5/01; combining sinewaves using elements operating in a non-switching manner H03B 21/00) [3, 2006.01]
H03K 17/00		Electronic switching or gating, i.e. not by contact-making and -breaking (gated amplifiers H03F 3/72; switching arrangements for exchange systems using static devices H04Q 3/52) [1, 2006.01]
H03K 19/00		Logic circuits, i.e. having at least two inputs acting on one output (circuits for computer systems using fuzzy logic G06N 7/02); Inverting circuits [1, 2006.01]
H03K 21/00		Details of pulse counters or frequency dividers [1, 2006.01]
H03K 23/00		Pulse counters comprising counting chains; Frequency dividers comprising counting chains (H03K 29/00 takes precedence) [1, 2006.01]
H03K 25/00		Pulse counters with step-by-step integration and static storage; Analogous frequency dividers [1, 2006.01]
H03K 27/00		Pulse counters in which pulses are continuously circulated in a closed loop; Analogous frequency dividers (feedback shift register counters H03K 23/54) [1, 4, 2006.01]
H03K 29/00		Pulse counters comprising multi-stable elements, e.g. for ternary scale, for decimal scale; Analogous frequency dividers [1, 2006.01]
H03K 99/00		Subject matter not provided for in other groups of this subclass [2013.01]
H03L		AUTOMATIC CONTROL, STARTING, SYNCHRONISATION OR STABILISATION OF GENERATORS OF ELECTRONIC OSCILLATIONS OR PULSES (generation of oscillations H03B) [3]
H03M		CODING, DECODING OR CODE CONVERSION, IN GENERAL (using fluidic means F15C 4/00; optical analogue/digital converters G02F 7/00; coding, decoding or code conversion, specially adapted for particular applications, see the relevant subclasses, e.g. G01D, G01R, G06F, G06T, G09G, G10L, G11B, G11C, H04B, H04L, H04M, H04N; ciphering or deciphering for cryptography or other purposes involving the need for secrecy G09C) [4]
H04		ELECTRIC COMMUNICATION TECHNIQUE
H05		ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
H10		SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR [2023.01]
H99		SUBJECT MATTER NOT OTHERWISE PROVIDED FOR IN THIS SECTION [2006.01]

IPC entry to be compared: No IPC entry bookmarked for comparison view [Version , Language ]