IPC Subgroup
H03K 4/5 in which a sawtooth voltage is produced across a capacitor
Introduced: September 1968
Last revised: January 2006
Full Title
Generating pulses having essentially a finite slope or stepped portions > having triangular shape > having sawtooth shape > using as active elements semiconductor devices > in which a sawtooth voltage is produced across a capacitor
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- PULSE TECHNIQUE
5 direct subcodes
Child Classifications
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- H03K 4/501 the starting point of the flyback period being determined by the amplitude of the voltage across the capacitor, e.g. by a comparator
- H03K 4/52 using two semiconductor devices so coupled that the input of each one is derived from the output of the other, e.g. multivibrator
- H03K 4/54 using a single semiconductor device with positive feedback through a transformer, e.g. blocking oscillator
- H03K 4/56 using a semiconductor device with negative feedback through a capacitor, e.g. Miller integrator
- H03K 4/58 Boot-strap generators
Top Applicants
Top 10 applicants by patent filingsfor class H03, 2013–2023, worldwide · Source: EPO PATSTAT
- QUALCOMM US 5,625
- SAMSUNG ELECTRONICS COMPANY KR 5,496
- MURATA MANUFACTURING COMPANY JP 5,478
- HUAWEI TECHNOLOGIES COMPANY CN 3,383
- INTEL CORPORATION US 3,091
- TEXAS INSTRUMENTS US 3,070
- MURATA MANUFACTURING COMPANY 2,722
- SKYWORKS SOLUTIONS US 2,290
- SEIKO EPSON CORPORATION 2,177
- IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158