Angle modulation (H03C5/00, H03C7/00 take precedence)

Introduced: September 1968

Title

Titles differ between systems:

IPC: Angle modulation

CPC: Angle modulation (H03C5/00, H03C7/00 take precedence)

Full titles differ between systems:

IPC:

Angle modulation

CPC:

Angle modulation (H03C5/00, H03C7/00 take precedence)

FM Frequency Modulation PLL PLLs Phase Locked Loop VCO Voltage Controlled Oscillator

Amplitude modulation and angle modulation produced simultaneously or at will by the same modulating signal Modulating electromagnetic waves

Of 8 combined children, 7 exist in both systems.

1 codes are CPC-only extensions.

2 shared codes have differing titles between IPC and CPC.

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H03C 3/005 CPC only CPC only
H03C 3/02 Details IPC+CPC Available in IPC and CPC
H03C 3/10 by means of variable impedance (H03C3/30 - H03C3/38 take precedence) IPC+CPC Available in IPC and CPC
H03C 3/30 by means of transit-time tube IPC+CPC Available in IPC and CPC
H03C 3/34 by deflection of electron beam in discharge tube IPC+CPC Available in IPC and CPC
H03C 3/36 by means of light-sensitive element IPC+CPC Available in IPC and CPC
H03C 3/38 by converting amplitude modulation to angle modulation IPC+CPC Available in IPC and CPC
H03C 3/42 by means of electromechanical devices (H03C3/28 takes precedence) since 1980 IPC+CPC Available in IPC and CPC

Class H03,2013–2023, worldwide · Source: EPO PATSTAT

Class H03,2013–2023, worldwide · Source: EPO PATSTAT