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PCE
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IPC Subgroup
H03B 5/32

being a piezoelectric resonator

Introduced: September 1968

Last revised: January 2006

Full Title

Generation of oscillations using amplifier with regenerative feedback from output to input > with frequency-determining element being electromechanical resonator > being a piezoelectric resonator

Classification Context

Section:
ELECTRICITY
Class:
ELECTRONIC CIRCUITRY
Subclass:
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

3 direct subcodes

Child Classifications

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  • H03B 5/34 active element in amplifier being vacuum tube
  • H03B 5/36 active element in amplifier being semiconductor device
  • H03B 5/38 the frequency-determining element being connected a bridge circuit to a closed loop in which the signal is transmitted