Variable gain amplifier in radio-frequency signal transceiver chip
A gain amplifier and gain amplification technology, applied in gain control, amplification control, electrical components, etc., to achieve the effect of easy implementation, good social and economic benefits, and small gain step control
Active Publication Date: 2015-11-11
陕西光电子先导院科技有限公司
View PDF7 Cites 3 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0006] The purpose of the present invention is mainly to solve the problem of amplifying the different power signals received by the antenna to the power required for quantization and demodulation
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0037] The specific principle of the variable gain amplifier in the radio frequency signal transceiver chip provided by the present invention is:
[0038] A variable gain amplifier 1 is included, and the low three-digit binary digital signal is used to control its gain. According to the assignment of the three-digit digital signal, the gain of the variable gain amplifier 1 can be changed accordingly.
[0039] A variable gain amplifier 2 is included. The gain of the variable gain amplifier 2 is controlled by the high two-digit binary digital signal. According to the assignment of the two-digit digital signal, the gain of the variable gain amplifier 2 can be changed accordingly. Here, two variable gain amplifiers 2 are used in cascade, and they both use the high two binary digital signals to control their gain.
[0040] It also includes a bias circuit, which provides the same tail current for the variable gain amplifier 1 and the two variable gain amplifiers 2, and provides them with a...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The present invention provides a variable gain amplifier in a radio-frequency signal transceiver chip. The variable gain amplifier can be applied to a receiver with a large dynamic input signal range and can realize precise control on the gain step size, and is less affected by the temperature. The variable gain amplifier comprises at least one low three bit binary variable gain amplifying unit, at least one high two bit binary variable gain amplifying unit, and a biasing circuit which is used for providing enable signals and same tail current for the low three bit binary variable gain amplifying unit and the high two bit binary variable gain amplifying unit; two orthogonal signals are subjected to variable gain amplification via the low three bit binary variable gain amplifying unit and the high two bit binary variable gain amplifying unit in sequence and then are output; or the two orthogonal signals are subjected to variable gain amplification via the high two bit binary variable gain amplifying unit and the low three bit binary variable gain amplifying unit in sequence and then are output.
Description
Technical field [0001] The invention relates to a variable gain amplifier used in a radio frequency signal transceiver chip, and is particularly suitable for a monolithic integrated radio frequency chip used in GPS and Beidou broadband radio frequency receivers. Background technique [0002] With the different transmission conditions of the signal received by the radio frequency receiver, the power of the effective signal received by the antenna will vary within a large range, and the power of the interference received by the antenna may also vary. [0003] In order to finally be able to demodulate the signal received by the antenna, a variable gain amplifier circuit is required to amplify the required signal of different power received by the antenna to the optimal power required for quantization by the baseband analog-to-digital converter. This can minimize the quantization noise introduced by the baseband analog-to-digital converter, thereby providing the demodulator with an opt...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Applications(China)
IPC IPC(8): H03G3/20
Inventor 黄海生陈顺舟李鑫
Owner 陕西光电子先导院科技有限公司