CPC Definition - Subclass H03J
This place covers:
- tuning of resonating circuits, in particular RLC circuits in which the inductance and/or the capacitance is controlled;
- this subclass also covers the control of tuning, including the combined control of tuning and other functions, e.g. combinations of tuning control and volume control, combinations of control of local oscillator circuits and of supplementary resonant circuits.
Attention is drawn to the following places, which may be of interest for search:
Indicating arrangements for measuring | |
Measuring, testing | |
Control in general | |
Signalling | |
Resonator consisting of distributed elements | |
Antennas | |
Oscillators | |
Filters comprising lumped elements | |
Automatic control or stabilisation of generators | |
Radio receiver circuits | |
Calibrating and monitoring of receivers and transmitters | |
Television receiver circuits |
This place covers:
- Control circuits that consist of a microprocessor: H03J 1/0008 - H03J 1/0091;
- Indicating arrangements, such as used on the display of receiving apparatus: H03J 1/02 - H03J 1/048;
This place covers:
Tuned circuits in which the tuning (or control) signal is continuously applied to the resonating circuit.
This place does not cover:
This place covers:
- Tuned circuits in which the tuning (or control) signal is not continuously applied to the resonating circuit;
- Radio frequency filters used for bandswitching in receivers and transmitters.
Attention is drawn to the following places, which may be of interest for search:
Electric switches in general |
This place covers:
Attention is drawn to the following places, which may be of interest for search:
Automatic tuning control for television receivers |
This place does not cover:
Automatic scanning over a band of frequencies |
Attention is drawn to the following places, which may be of interest for search:
Automatic tuning control for television receivers |
This place covers:
Remote control of tuned circuits such as used in television and radio receivers and consumer electronics in general.
This place does not cover:
Mechanical remote-control arrangements | |
Using a microprocessor | |
Constructional details of remote control switching devices |