Novel gain temperature compensation control circuit
A technology of temperature compensation and control circuit, applied in control/adjustment system, adjustment of electrical variables, instruments, etc., can solve problems such as compensation inconsistency, process batch fluctuation, etc., and achieve the effect of insensitivity to process fluctuation and good matching of arbitrary attenuation
Active Publication Date: 2022-01-28
思诺威科技(无锡)有限公司
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0007] Purpose of the invention: To solve the problem of inconsistent compensation caused by process batch fluctuations and discreteness between different chips, and to make the temperature compensation curve conform to dB-in-Linear or any other system required characteristics and satisfaction The matching of attenuators under different temperature characteristics, the present invention proposes a new control circuit for gain temperature compensation
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
[0046] The technical scheme of the present invention will be further described in conjunction with the accompanying drawings and embodiments.
[0047] The overall framework of the present invention is as Figure 4 As shown, it mainly consists of the following six parts: bandgap / positive temperature coefficient reference source, positive temperature coefficient voltage programmable circuit, dB linear interpolation generation circuit, attenuator series tube control voltage generation circuit, mirror attenuator parallel tube control voltage Generation circuit and signal path Tee attenuator.
[0048] Now in conjunction with each accompanying drawing, main working principle of the present invention and control relationship are further described:
[0049] The bandgap / positive temperature coefficient reference generates a constant bandgap voltage V bg and bandgap reference current (bandgap reference voltage divided by the on-chip resistance), using the bandgap reference current ...
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 invention discloses a novel gain temperature compensation control circuit comprising a band gap / positive temperature coefficient reference source used for generating a band gap reference current and a positive temperature coefficient current, a positive temperature coefficient voltage programmable circuit used for generating a temperature coefficient programmable control voltage Vctr by taking the current of the positive temperature coefficient and the band-gap reference current as reference current, a dB linear interpolation generation circuit used for converting the control voltage Vctr into a control current Ictr corresponding to a switch resistor required by an attenuator, an attenuator series tube control voltage generation circuit used for converting the control current Ictr into dB linear control voltage Vctrp used for controlling a series tube of the attenuator and a mirror image attenuator, a mirror image attenuator parallel tube control voltage generation circuit used for obtaining a voltage Vctrn for controlling the signal attenuator to obtain optimal input and output impedance matching through negative feedback based on the dB linear control voltage Vctrp, and a signal attenuator used for obtaining optimal input and output impedance matching within an effective attenuation range according to the voltage Vctrn.
Description
technical field [0001] The invention belongs to the technical field of circuit design, and in particular relates to a novel gain temperature compensation control circuit. Background technique [0002] Modern communication systems and phased array systems are developing towards broadband, multi-channel and high-order modulation modes, which requires that the chip gain is not sensitive to changes in temperature, but the inherent characteristics of semiconductor materials lead to the characteristics of transistors and resistors in the chip It changes greatly at different temperatures, so the gain of the chip changes greatly with the temperature; in a multi-channel complex system, the gain change of different channels directly affects the receiving sensitivity of the MIMO system and the phased array system and emission linearity. [0003] In order to compensate the gain of the chip as the temperature changes, the current chip temperature compensation mainly has the following th...
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): G05F1/567
CPCG05F1/567
Inventor 诸小胜王镇黄堃王永利夏剑平
Owner 思诺威科技(无锡)有限公司