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High stable local oscillator LO generation circuit

A generation circuit, high stability technology, applied in the field of satellite signal reception, can solve the problems of high production cost, large LO variation range, large PCB board area, etc., to achieve the effect of reducing manufacturing cost and PCB board area

Inactive Publication Date: 2016-06-01
CHINA COMM TECHHUBEI CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The LO generated by such an LO generation circuit has a large variation range and poor stability, and the PCB board area occupied by the circuit is relatively large, and the production cost is high.

Method used

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  • High stable local oscillator LO generation circuit
  • High stable local oscillator LO generation circuit

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Embodiment Construction

[0025] In order to illustrate the embodiments and technical solutions of the present invention more clearly, the technical solutions of the present invention will be described in more detail below in conjunction with the accompanying drawings and embodiments. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Example. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0026] figure 2 The schematic diagram of the LO generating circuit provided for the embodiment of the present invention, such as figure 1 As shown, the circuit includes: a radio frequency amplification module 201, a filtering module 202, a frequency down mixing module 203 and a circuit switching module 204; wherein,

[0027] The radio frequency amplification module 201 is used to amplify the i...

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Abstract

The invention provides a high stable local oscillator LO generation circuit. The circuit comprises a radio frequency amplification module for amplifying input radio frequency signals and providing a suitable grid bias to a follow-up circuit; a filter module for filtering received radio frequency signals into the work demanded frequency R range of a product; a frequency transformation module for carrying out frequency transformation to the filtered radio frequency signals and outputting a demanded intermediate frequency; and a circuit switching module for switching 13 / 18V H / L four-way signals of the product.

Description

technical field [0001] The invention relates to the technical field of satellite signal reception, in particular to a highly stable local oscillation frequency LO generation circuit. Background technique [0002] The outdoor unit of the satellite radio and television receiving system is composed of a receiving antenna, a feed source, a microwave frequency converter and a transmission feeder. Microwave frequency converter is the most front-end equipment in the whole satellite radio and TV receiving system. It consists of a low noise microwave amplifier, a local oscillator circuit, a mixer and an intermediate amplifier circuit. The microwave frequency converter is the only active component of the outdoor unit. It is installed outdoors (or in the balcony) together with the antenna feeder system and connected to the satellite receiver through a coaxial cable. The sensitivity or signal-to-noise ratio of the system largely depends on the performance index of the microwave freque...

Claims

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Application Information

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IPC IPC(8): H03D7/16
CPCH03D7/16
Inventor 詹宇昕查明泰潘雄广罗得辉
Owner CHINA COMM TECHHUBEI CO LTD
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