Digital voltage gain control device

A gain control and digital voltage technology, applied in the direction of gain control, amplification control, electrical components, etc., can solve the problems of small signal-to-noise ratio improvement, limited adjustment accuracy and adjustment range, slow response speed, etc., to achieve controllable Wide range of gain changes, fast response, and high adjustment accuracy

Inactive Publication Date: 2010-09-22
SHANGHAI ENG CENT FOR MICROSATELLITES
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  • Abstract
  • Description
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Problems solved by technology

However, the above two have their own advantages and disadvantages. The analog automatic gain control has the advantage of fast response, but its adjustment accuracy and adjustment range are limited; while the digital automatic gain control has the advantage of high adjustment accuracy, but its response speed Relatively slow, and because it is at the back end of signal reception, it has relatively little effect on improving the signal-to-noise ratio of the signal

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Embodiment Construction

[0019] In order to make the purpose and features of the present invention more comprehensible, the specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings.

[0020] see figure 1 , figure 1 A schematic structural diagram of the digital voltage gain control device of the present invention is shown. figure 1 Among them, the digital voltage gain control device includes a PC user control module 1, a serial port protocol interface module 2, a microprocessor module 3, a digital-to-analog conversion module 4, a voltage control gain module 5, an analog signal input interface module 7 and an analog signal output interface Module 8. Combine below figure 1 Describe the function and structure of each module.

[0021] The PC user control module 1 is used to preset the desired gain level through the PC, convert the gain level into a corresponding digital control signal and send it according to the serial port ...

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Abstract

The invention discloses a digital voltage gain control device, which realizes the gain control of an analog signal at the intermediate frequency end by converting a digital control signal into analog control voltage so as to act on a voltage control gain module. The device has the advantages of wide controlled gain change range, high response speed, and high adjustment accuracy. Meanwhile, because the device is provided with user control software which runs on a PC, the user can designate the needed gain level at the user interface, the operation is convenient and the intellectualization is realized. In addition, a user programming interface is provided, so the user can perform the customized on-line programming on a digital-to-analog conversion module to realize the control and change ofthe grain and flexible cascade connection with customer equipment. Therefore, a complete auto gain control loop is formed, and has high degree of freedom and expansion space.

Description

technical field [0001] The invention relates to the technical field of electronic communication, in particular to a digital voltage gain control device. Background technique [0002] The current digital communication technology is developing at an ever-changing speed. From the second-generation time-division multiple access GSM technology, to the third code-division multiple access CDMA technology, and then to the recent orthogonal frequency-division multiple access OFDM technology, in just 20 years In the past few years, communication technology has developed several generations. Automatic Gain Control (AGC) is a key technology in communication, especially for the current popular CDMA technology (such as the third-generation communication TD-SCDMA standard designed by our country). One of the difficulties in the implementation of CDMA technology is power control. CDMA base stations need to automatically control the transmit power of each user, and at the same time increase...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20
Inventor 梁广龚文斌刘会杰余金培
Owner SHANGHAI ENG CENT FOR MICROSATELLITES
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