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Low Voltage Reference Current Circuit

A circuit and current source technology, applied in the field of current reference circuit, can solve problems such as current leakage and affecting the performance of current mirror

Active Publication Date: 2021-02-09
SHENZHEN GOODIX TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, low supply voltages face current leakage issues that can significantly affect the performance of the current mirror, and the low output resistance of the current mirror may require an output buffer to drive the output load

Method used

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  • Low Voltage Reference Current Circuit
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Embodiment Construction

[0014] A more complete understanding of the invention will be obtained from the detailed description given below and the accompanying drawings of preferred embodiments of the invention, however, the invention should not be limited to specific embodiments, but are provided for illustration and understanding only. The embodiments are described in sufficient detail to enable those skilled in the art to practice the invention. Other embodiments may be utilized and structural, logical, and electrical changes may be made without departing from the scope of the present invention.

[0015] It will be understood that when an element or component is referred to as being "adjacent", "connected" or "coupled" to another element or component, it can be directly adjacent, connected or coupled to the other element or component, or intervening elements may also be present. element or component. In contrast, when an element is referred to as being "directly connected to" or "directly coupled t...

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PUM

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Abstract

A current reference circuit comprising: a current source, a first p-channel metal oxide semiconductor (p-channel metal oxide semiconductor, PMOS) transistor having a source coupled to a first supply voltage, a gate and a current a drain of a source, and an n-channel metal oxide semiconductor (n-channel metal oxide semiconductor, NMOS) transistor having a drain coupled to a second supply voltage, the drain coupled to the first PMOS transistor the grid. The current reference circuit also includes a first resistive element having a first terminal coupled to the source of the NMOS transistor and the gate of the first PMOS transistor and a second terminal coupled to ground potential, two PMOS transistors having a source coupled to the first supply voltage, and a second resistive element having a first terminal coupled to the first terminal of the first resistive element and coupled to the first The second terminal of the gate of the second PMOS transistor.

Description

technical field [0001] The present invention relates generally to current reference circuits, and more particularly to current reference circuits operating at low voltages. Background technique [0002] The dimensions of integrated circuit components continue to shrink, and the demand for battery-powered devices continues to increase. Reference current circuits are widely used in integrated circuits to generate bias currents. However, as the supply voltage drops, some commonly used current reference circuits no longer function or perform poorly under low voltage conditions. Therefore, the supply voltage presents one of the challenges in the design of the reference current circuit. Most analog systems are equipped with battery voltage. Generating a reference current from a battery voltage usually provides good performance in terms of leakage current and output resistance, but has relatively high power dissipation. Generating the reference current from a low supply voltage...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/56
CPCG05F1/56
Inventor 穆罕默德·阿布迪娜艾哈迈德·埃米拉哈山·奥萨马·埃尔温
Owner SHENZHEN GOODIX TECH CO LTD