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A Constant Amplitude Output Frequency Synthesizer

A technology of output frequency and digital frequency synthesis, which is applied in the improvement field of existing frequency synthesizers, can solve the problems of large amplitude fluctuation of output signal and product performance degradation, and achieves simple hardware circuit structure, low cost and small amplitude fluctuation. Effect

Inactive Publication Date: 2013-03-13
LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

Its disadvantage is that the amplitude of the output signal fluctuates greatly due to temperature changes. In the full temperature range required by product design, the difference between the maximum amplitude and the minimum amplitude may sometimes be more than 4 decibels, which will affect the design of the subsequent stage circuit. Many negative effects, resulting in reduced product performance

Method used

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  • A Constant Amplitude Output Frequency Synthesizer
  • A Constant Amplitude Output Frequency Synthesizer

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Embodiment Construction

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Abstract

The invention belongs to the technical field of frequency synthesis and relates to the improvement of the existing frequency synthesizer. It includes a microprocessor [1], a digital frequency synthesizer [2], a filter [3], and an amplifier [4], and is characterized by a temperature sensor [5] and an A / D converter [6] , the signal output end of the temperature sensor [5] is connected with the input end of the A / D converter [6], and the output end of the A / D converter [6] is connected with the microprocessor [1] through the bus. The output signal amplitude of the invention has little amplitude fluctuation caused by temperature change.

Description

A Constant Amplitude Output Frequency Synthesizer technical field The invention belongs to the technical field of frequency synthesis and relates to the improvement of the existing frequency synthesizer. Background technique The structural principle block diagram of a traditional frequency synthesizer is shown in Figure 1, which is composed of a microprocessor 1, an amplitude adjustment register 2, a digital frequency synthesizer 3, a filter 4 and an amplifier 5. The control signal output end of the microprocessor 1 is connected with the input end of the amplitude adjustment register 2 and the frequency control input end 3a of the digital frequency synthesizer 3 respectively, and the output end of the amplitude adjustment register 2 is connected with the amplitude control input end of the digital frequency synthesizer 3 3b connection, the output terminal 3c of digital frequency synthesizer 3 outputs analog signal, and this output terminal is connected with the input termin...

Claims

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Application Information

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IPC IPC(8): H03L7/00
Inventor 陆新权
Owner LEIHUA ELECTRONICS TECH RES INST AVIATION IND OF CHINA
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