Double-loop transimpedance amplifier
A transimpedance amplifier and amplifier technology, applied in the field of photoelectric detection, can solve the problems of limited bandwidth, common gate structure deterioration noise, low circuit versatility, etc., to improve the bandwidth index, reduce the sensitivity of input parasitic parameters, and improve the circuit. significant effect
Pending Publication Date: 2021-01-08
AEROSPACE INFORMATION RES INST CAS
View PDF0 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
Resistive feedback transimpedance amplifiers can achieve lower noise, but their parameters such as bandwidth and noise are more sensitive to input parasitic parameters, the circuit versatility is low, and the bandwidth is strictly limited; adjusting the common gate transimpedance amplifier to the input parasitic parameters Insensitive to influence, high versatility, but the introduction of common gate structure deteriorates the noise
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
[0047] The present disclosure provides a double-loop transimpedance amplifier, which introduces a capacitor positive feedback loop into a traditional resistor feedback transimpedance amplifier, and the two feedback loops are nested with each other, and the capacitor positive feedback loop and the resistor feedback loop share the front The double-loop transimpedance amplifier of the present application has the advantages of high bandwidth, low noise, and low parasitic sensitivity.
[0048] In order to make the purpose, technical solutions and advantages of the present disclosure clearer, the present disclosure will be further described in detail below in conjunction with specific embodiments and with reference to the accompanying drawings.
[0049] In an embodiment of the present disclosure, a dual-loop transimpedance amplifier is provided, combining Figure 1 to Figure 2 As shown, the dual-loop transimpedance amplifier includes:
[0050] Current signal input terminal;
[005...
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 provides a double-loop transimpedance amplifier. The double-loop transimpedance amplifier comprises a current signal input end; an amplifier group connected with the current signal inputend and comprising a first-stage amplifier and a second-stage amplifier which are connected in sequence; a feedback resistor, wherein two ends of the feedback resistor are respectively connected withthe input end and the output end of the first-stage amplifier to form a resistance negative feedback loop; and a feedback capacitor, wherein one end of the feedback capacitor is connected to the output end of the second-stage amplifier and then connected to the voltage signal output end of the double-loop transimpedance amplifier, the other end of the feedback capacitor is connected to the inputend of the first-stage amplifier to form a capacitance positive feedback loop, and the capacitance positive feedback loop and the resistance negative feedback loop share the first-stage amplifier to form the nested double-loop transimpedance amplifier.
Description
technical field [0001] The present disclosure relates to the technical field of photoelectric detection, in particular to a double-loop transimpedance amplifier used for front-end signal processing of photoelectric signals. Background technique [0002] Transimpedance amplifiers are widely used in the field of photoelectric detection. The specific application industries include optical fiber communication, laser ranging, laser guidance, etc. Its function is the detection and amplification of weak photoelectric signals. There are two main structures of transimpedance amplifiers: resistance feedback type transimpedance amplifier and adjusted common gate type transimpedance amplifier. Resistive feedback transimpedance amplifiers can achieve lower noise, but their parameters such as bandwidth and noise are more sensitive to input parasitic parameters, the circuit versatility is low, and the bandwidth is strictly limited; adjusting the common gate transimpedance amplifier to the ...
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 IPC IPC(8): H03F1/42H03F1/26H03F1/02H03F1/08
CPCH03F1/42H03F1/26H03F1/0205H03F1/083
Inventor 刘帅谭荣清
Owner AEROSPACE INFORMATION RES INST CAS