H03B 5/32 being a piezoelectric resonator (selection of piezoelectric material H10N30/00)
Introduced: September 1968
Title
Titles differ between systems:
IPC: being a piezoelectric resonator
CPC: being a piezoelectric resonator (selection of piezoelectric material H10N30/00)
Full Title
Full titles differ between systems:
Generation of oscillations using amplifier with regenerative feedback from output to input > with frequency-determining element being electromechanical resonator > being a piezoelectric resonator
Generation of oscillations using amplifier with regenerative feedback from output to input (H03B9/00, H03B15/00 take precedence) > with frequency-determining element being electromechanical resonator > being a piezoelectric resonator (selection of piezoelectric material H10N30/00)
Of 5 combined children, 3 exist in both systems.
2 codes are CPC-only extensions.
3 shared codes have differing titles between IPC and CPC.
Child Classifications
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- H03B 5/34 active element in amplifier being vacuum tube (H03B5/38 takes precedence) IPC+CPC Available in IPC and CPC
- H03B 5/36 active element in amplifier being semiconductor device ( , H03B5/38 take precedence) +3 CPC IPC+CPC Available in IPC and CPC
- H03B 5/38 frequency-determining element being connected via bridge circuit to closed ring around which signal is transmitted IPC+CPC Available in IPC and CPC