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Voltage/current double-loop control device and chip

A technology of voltage, current and control devices, which is applied in the direction of control/regulation systems, regulation of electrical variables, instruments, etc., and can solve problems such as distortion and affecting the accuracy of double-loop control systems

Active Publication Date: 2012-05-16
ACTIONS ZHUHAI TECH CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the current sink directly becomes the load of the devices in the comparison and amplification unit 104, certain distortion is caused to the output of the comparison and amplification unit 104, which affects the accuracy of the dual-loop control system

Method used

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  • Voltage/current double-loop control device and chip
  • Voltage/current double-loop control device and chip
  • Voltage/current double-loop control device and chip

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0070] In this embodiment, the current loop MOS transistor 3054 and the voltage loop MOS transistor 3055 use PMOS transistors, and a current sink is used to realize the function of the common-mode level subunit 1056 .

[0071] Such as image 3 As shown, at this time, the selection unit 305 in the circuit specifically includes: a current loop MOS transistor 3054, a voltage loop MOS transistor 3055, and a current sink 3056, and the voltage output terminal of the comparison amplifier unit 304 is connected to the gate of the voltage loop MOS transistor 3055. pole, the current output terminal of the comparison amplifier unit 304 is connected to the gate of the current loop MOS transistor 3054, the source of the current loop MOS transistor 3054 is connected to the source of the voltage loop MOS transistor 3055, and connected to the circuit voltage source, the current The drain of the loop MOS transistor 3054 is connected to the drain of the voltage loop MOS transistor 3055, and conn...

Embodiment 2

[0078] In this embodiment, the current loop MOS transistor 4054 and the voltage loop MOS transistor 4055 use NMOS transistors, and a current sink is used to realize the function of the common-mode level subunit 1056 .

[0079] Such as Figure 4 As shown, at this time, the selection unit 405 in the circuit specifically includes: a current loop MOS transistor 4054, a voltage loop MOS transistor 4055, and a current sink 4056, and the voltage output terminal of the comparison amplifier unit 404 is connected to the gate of the voltage loop MOS transistor 4055. pole, the current output terminal of the comparison amplifier unit 404 is connected to the gate of the current loop MOS transistor 4054, the source of the current loop MOS transistor 4054 is connected to the source of the voltage loop MOS transistor 4055, and grounded, the current loop MOS The drain of the tube 4054 is connected to the drain of the voltage loop MOS tube 4055, and connected to the negative pole of the current ...

Embodiment 3

[0087] In this embodiment, the current loop MOS transistor 5054 and the voltage loop MOS transistor 5055 use PMOS transistors, and MOS transistors and voltage sources are used to realize the function of the common-mode level subunit 1056 .

[0088] Such as Figure 5 As shown, at this time, the selection unit 505 in the circuit specifically includes: a current loop MOS transistor 5054, a voltage loop MOS transistor 5055, a first amplifying MOS transistor 5056, a second amplifying MOS transistor 5057, a first voltage source 5058 and a second amplifying MOS transistor 5057. Two voltage sources 5059, wherein, the voltage output terminal of the comparison and amplification unit 504 is connected to the gate of the voltage loop MOS transistor 5055, the current output terminal of the comparison and amplification unit 504 is connected to the grid of the current loop MOS transistor 5054, and the current loop MOS transistor The source of the 5054 is connected to the source of the voltage...

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PUM

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Abstract

The invention discloses a voltage / current double-loop control device and a chip, relating to the field of integrated circuits. In the voltage / current double-loop control device provided by the embodiment of the invention, a selection unit comprises a selection amplifying subunit and a common mode subunit, wherein the selection amplifying subunit is used for amplifying a signal with a large voltage value in output signals of a comparison amplifying unit and outputting the signal to a voltage controlled resistor as a control signal. Since the signal with a large voltage value in the output signals of the comparison amplifying unit is amplified, the resistance value of the voltage controlled resistor can be controlled more accurately, and the control accuracy of the voltage / current double-loop control device can be improved further.

Description

technical field [0001] The invention relates to the field of integrated circuits, in particular to a voltage and current double-loop control device and a chip. Background technique [0002] Voltage and current double-loop control devices are widely used in overcurrent protection circuits and charger circuits. In the negative feedback loop control system, the dual-loop control device is equipped with a voltage sampling module and a current sampling module at the same time, and controls the negative feedback system to output constant voltage or output constant current according to the output results of the voltage sampling module or current sampling module, thereby realizing Dual loop control. [0003] In the prior art, the voltage and current double-loop control device mainly includes two control modes. One is a digital control method. When the output current or voltage meets certain conditions, it is forced to switch to another loop for control. The disadvantage of this s...

Claims

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Application Information

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IPC IPC(8): G05F1/40
Inventor 汤觅江力
Owner ACTIONS ZHUHAI TECH CO
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