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Apparatus and method for carrier frequency correction of remote controller

A carrier frequency, correction device technology, applied in power oscillators, electrical components, transmission systems, etc., can solve problems such as insufficient stability and low cost

Inactive Publication Date: 2008-03-12
HOLTEK SEMICON
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The oscillation frequency of the RC oscillator is related to the product of the resistor and capacitor, so the error of the RC oscillator may be as high as 50%, which makes the stability insufficient, so the oscillator of the remote control cannot be designed with this architecture, so that its low-cost advantage cannot be brought into play

Method used

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  • Apparatus and method for carrier frequency correction of remote controller
  • Apparatus and method for carrier frequency correction of remote controller
  • Apparatus and method for carrier frequency correction of remote controller

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Embodiment Construction

[0024] Because the RC oscillator itself is greatly affected by the environment, the principle of the present invention does not directly use the rated frequency generated by the RC oscillator, but adopts a concept of relative frequency. Under the principle of not changing the design of the receiving part 2, the RC The frequency generated by the oscillator is an integer multiple of the frequency to generate a carrier wave to meet the specific frequency that the receiving unit can receive. Please refer to FIG. 2A , FIG. 2B , and FIG. 2C , which are schematic diagrams of the principles of the present invention. Fig. 2A is the wave form of the carrier wave 110 that the receiver 2 can respond to, and Fig. 2B is the wave form of the wave carrier produced by an RC oscillator under an environmental condition. As can be seen from Fig. 2B, under the environmental condition, the period of the carrier wave 110 is the RC oscillation 6 times that generated by the oscillator, but if the envi...

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Abstract

A remote controller carrier wave frequency correction apparatus and method, wherein the apparatus comprises an oscillator, a memory unit, a correction alarm device and a processor connected with the oscillator, the memory unit and the correction alarm device. When no correction signal is received, the processor calculates the alteration frequency of the basic wave high and low potentials, producing a counting value, once the counting value equals the matching value, the electric potential of the carrier wave is changed, and when the correction signal is received, the processor changes the matching value till the correction signal disappears, the upgraded matching value is stored into the memory.

Description

technical field [0001] The invention relates to a remote control carrier frequency correction device and method, in particular to a remote control carrier frequency correction device and method using a resistance-capacitance oscillator. Background technique [0002] Remote controllers are very commonly used devices in daily life, such as door control, home appliances such as TVs, audio-visual equipment, air conditioners, etc., which bring a lot of convenience to people. [0003] Please refer to Figure 1, which is a working structure diagram of the remote control. The remote control includes a transmitting part 1 and a receiving part 2 . The transmitting part also includes an oscillator 11, which generates a carrier wave 110 according to a specific carrier frequency; a controller 12, which generates a control command 120 according to a user command, and a modulator 13, which is connected with the oscillator 11 and the controller 12, The carrier wave 110 is modulated with th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03B1/00H04B1/04
Inventor 蔡荣宗李兆国
Owner HOLTEK SEMICON