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Temperature detecting apparatus, switch capacitor apparatus and voltage integrating circuit thereof

A technology of voltage integration and switching capacitors, which is applied in the field of switching capacitor devices and their voltage integration circuits, and temperature sensing devices, and can solve the problems of voltage integrator performance degradation and slow response time

Active Publication Date: 2015-02-25
NAN YA TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the operational amplifier OP1 does not have a high gain or the response time of the operational amplifier OP1 is very slow, the operational amplifier OP1 will have a variable voltage Voffset, and the performance of the voltage integrator will also be reduced.

Method used

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  • Temperature detecting apparatus, switch capacitor apparatus and voltage integrating circuit thereof
  • Temperature detecting apparatus, switch capacitor apparatus and voltage integrating circuit thereof
  • Temperature detecting apparatus, switch capacitor apparatus and voltage integrating circuit thereof

Examples

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Embodiment Construction

[0054] Please refer to figure 2 , figure 2 It is a circuit diagram of a voltage integration circuit 200 shown in an embodiment of the present invention. The voltage integration circuit 200 includes an operational amplifier OP1 , a capacitor C1 and a current source 210 . The operational amplifier OP1 has a non-inverting input terminal IE1 , an inverting input terminal IE2 and an output terminal OE. The output terminal OE of the operational amplifier OP1 generates the output voltage Vout, and the operational amplifier OP1 receives the reference voltage Vref through the non-inverting input terminal IE1. The current IIN flows into the inverting input IE2 of the operational amplifier OP1, thus generating a voltage Vneg at the inverting input IE2 of the operational amplifier OP1. The operational amplifier OP1 generates an output voltage Vout at its output OE. The current source 210 is coupled to the output terminal OE of the operational amplifier OP1 and the capacitor C1, and ...

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PUM

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Abstract

The invention provides a temperature detecting apparatus, a switch capacitor apparatus and a voltage integrating circuit. The voltage integrating circuit includes an operating amplifier, a capacitor and a current source. The operating amplifier has a positive input end, a negative input end and an output end. The output end of the operating amplifier generates an output voltage, and the positive input end receives a reference voltage. The capacitor is coupled between the output end and the negative input end of the operating amplifier. The current source is coupled to the output end of the operating amplifier. The current source draws a replica current from the capacitor, and a current level of the replica current is determined according to a current level of a current flowing to the negative input end of the operating amplifier.

Description

technical field [0001] The present invention relates to a voltage integrating circuit, and more particularly to a temperature sensing device with a low gain and / or low speed operational amplifier, a switched capacitor device and a voltage integrating circuit thereof. Background technique [0002] Please refer to figure 1 , figure 1 is a circuit diagram of a conventional voltage integrator 100. The voltage integrator 100 includes a capacitor C1 and an operational amplifier OP1. The operational amplifier OP1 has a non-inverting input terminal, an inverting input terminal and an output terminal. The non-inverting input terminal of the operational amplifier receives a reference voltage Vref. The capacitor C1 is coupled between the inverting input terminal and the output terminal of the operational amplifier OP1. The inverting input terminal of the operational amplifier OP1 receives the current IIN, and the output terminal of the operational amplifier OP1 generates an output...

Claims

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Application Information

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IPC IPC(8): G01K7/00
CPCH03F3/45071H03F1/34G01K7/00H03F3/45475H03F2200/264H03F2203/45512G01K7/21
Inventor 潘栋
Owner NAN YA TECH
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