IPC Main Group
H03D 13/00 Circuits for comparing the phase or frequency of two mutually-independent oscillations
Introduced: September 1968
Last revised: January 2006
Classification Context
- Section:
- ELECTRICITY
- Class:
- ELECTRONIC CIRCUITRY
- Subclass:
- DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
Scope Notes
Limiting references: Arrangements for measuring phase angle between a voltage and a current or between voltages or currents