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Enhanced circuit applied to op amp slew rate

A technology of conversion rate and operational amplifier, which is applied to parts of amplifiers, amplifiers with field effect devices, improved amplifiers to improve efficiency, etc., can solve problems such as the impact of operational amplifier performance, to enhance conversion efficiency and ensure full input domain following or responsiveness, highlighting the effects of substantive features

Active Publication Date: 2021-06-04
3PEAK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It will inevitably have an impact on op amp performance

Method used

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  • Enhanced circuit applied to op amp slew rate
  • Enhanced circuit applied to op amp slew rate
  • Enhanced circuit applied to op amp slew rate

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Embodiment Construction

[0021] The specific implementation of the present invention will be described in further detail below in conjunction with the accompanying drawings of the embodiments, so as to make the technical solution of the present invention easier to understand and grasp, so as to define the protection scope of the present invention more clearly.

[0022] The designer of the present invention comprehensively analyzes the deficiencies in many aspects of the operational amplifier slew rate enhancement design in traditional technology and the improved architecture that has been reported, and considers and improves the defects in various architectures, combining his own experience and Creative labor, innovatively proposed a conversion efficiency enhancement circuit applied to operational amplifiers, so as to improve the ability of operational amplifiers to follow or respond to input signals.

[0023] Such as Figure 4 As shown, this is applied to the enhancement circuit of the conversion rat...

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Abstract

The invention discloses an enhancement circuit applied to the conversion rate of an operational amplifier. The operational amplifier is a folded cascode two-stage operational amplifier. circuit, and the positive and negative input terminals of the two increasing-transfer circuits are respectively connected to the positive and negative input terminals of the operational amplifier. The current output terminal of the circuit is connected to the compensation capacitor node SRp of the second stage operational amplifier. Applying the slew rate enhancement circuit of the present invention, using the input signal difference to reach a certain threshold value to generate slew current to control the charging and discharging current of the compensation capacitor, can effectively enhance the conversion efficiency of the operational amplifier, and when the input signal difference is less than the threshold value, the There is no influence on the main circuit of the operational amplifier, which effectively guarantees the full input domain following or response capability of the folded cascode two-stage operational amplifier.

Description

technical field [0001] The invention relates to a design for improving the performance of an operational amplifier in integrated circuit design, in particular to a circuit design for enhancing conversion efficiency of an operational amplifier. Background technique [0002] Op amp is short for Operational Amplifier. In actual circuits, some kind of functional module is usually combined with a feedback network. Because it was used in analog computers in the early days to realize mathematical operations, it was named "operational amplifier", and this name has continued to this day. An operational amplifier is a circuit unit named from a functional point of view, which can be realized by a discrete device or in a semiconductor chip. With the development of semiconductor technology, the vast majority of operational amplifiers exist in the form of a single chip. Today there are many types of operational amplifiers, which are widely used in almost all industries. [0003] Opera...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03F1/02H03F3/16
CPCH03F1/0205H03F3/16
Inventor 李寰刘青凤
Owner 3PEAK INC