Low-power high-slew-rate operational amplifier suitable for ultra-wide band microwave detection

An operational amplifier and microwave detection technology, which is applied in the direction of DC-coupled DC amplifiers, differential amplifiers, positive feedback circuit devices, etc., can solve problems such as limited applications

Inactive Publication Date: 2016-01-20
TIANJIN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In recent years, due to the rapid expansion of the market, low-voltage and low-power products have become small in size and highly integrated, which greatly limits their application in low-voltage and low-power multi-stage operational amplifier circuits.

Method used

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  • Low-power high-slew-rate operational amplifier suitable for ultra-wide band microwave detection

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Embodiment Construction

[0016] In order to overcome the deficiencies of the prior art, the present invention proposes a low-power high-slew-rate operational amplifier for ultra-wideband microwave detection. Based on the original RecyclingFoldedcascode amplifier, this paper uses the input end of the torn cascode current mirror, A smaller input current doubles the output current, thereby increasing the slew rate at the output to achieve a high slew rate. At the same time, a positive feedback loop is used to suppress the ripple of the common-mode signal and the power supply, thereby improving the PSRR and CMRR of the amplifier. The bandwidth of the amplifier is then increased accordingly. Finally, under the condition of the same chip area, the slew rate (SR) and PSRR of the amplifier are improved.

[0017] The invention proposes a low power consumption high slew rate operational amplifier for ultra-broadband microwave detection. The amplifier is composed of a Recycling folded cascode amplifier stage, a...

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Abstract

The invention relates to a large-scale integrated circuit, and discloses a low-power high-slew-rate operational amplifier suitable for ultra-wide band microwave detection, for realizing a high slew rate through simultaneously improving the PSRR and the CMRR of an amplifier. For this end, the technical scheme employed by the invention is as follows: the low-power high-slew-rate operational amplifier suitable for ultra-wide band microwave detection is composed of a Recycling folded cascade amplifying stage, a slew rate enhanced stage and a PSRR enhanced output stage. Differential mode signals Vin- and Vin+ are input by the Recycling folded cascade amplifying stage, and after being subjected to the slew rate enhancement effect of a cascade current mirror, finally reach to an output end Vout through the PSRR enhanced output stag. The low-power high-slew-rate operational amplifier is mainly applied to the design and manufacture of the large-scale integrated circuit.

Description

technical field [0001] The invention relates to a large-scale integrated circuit, low voltage and low power consumption, ultra-wideband microwave detection, slew rate, operational amplifier, and specifically relates to a low-power consumption high-slew rate operational amplifier suitable for ultra-wideband microwave detection. Background technique [0002] Low-voltage, low-power, broadband operational amplifiers have always been an active area of ​​research in low-power analog circuits. Research on ultra-wideband (UWB) microwave detection is also very active recently. The application of ultra-wideband microwave requires the amplifier to have high signal anti-interference ability and high-speed processing characteristics. Therefore, a multi-stage operational amplifier cannot be used, because its bandwidth will decrease as the number of gain stages increases, and only a single-stage operational amplifier can be used. However, the performance parameters (such as gain, slew ra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03F1/38H03F3/45
Inventor 肖夏张庚宇
Owner TIANJIN UNIV
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