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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 4/52 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

  1. QUALCOMM US 5,625
  2. SAMSUNG ELECTRONICS COMPANY KR 5,496
  3. MURATA MANUFACTURING COMPANY JP 5,478
  4. HUAWEI TECHNOLOGIES COMPANY CN 3,383
  5. INTEL CORPORATION US 3,091
  6. TEXAS INSTRUMENTS US 3,070
  7. MURATA MANUFACTURING COMPANY 2,722
  8. SKYWORKS SOLUTIONS US 2,290
  9. SEIKO EPSON CORPORATION 2,177
  10. IBM (INTERNATIONAL BUSINESS MACHINES CORPORATION) US 2,158