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Voltage reference circuit

A voltage reference and circuit technology, applied in the direction of adjusting electrical variables, control/regulation systems, instruments, etc., can solve the problems of reducing the service life of the chip, affecting the stability of the circuit, and being easily affected by temperature, so as to improve the driving ability and improve Stabilization, effects that improve precision and stability

Inactive Publication Date: 2015-03-11
李钢
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, in the existing voltage reference circuit, since there are many electronic components involved, it is easily affected by temperature, so the output voltage is unstable, which will not only affect the stability of the circuit operation, but also reduce the service life of the chip.

Method used

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  • Voltage reference circuit

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Embodiment Construction

[0010] Such as figure 1 The reference source circuit shown includes a triode Q3, the collector of the triode Q3 is connected to 12V voltage, the emitter of the triode Q3 is connected to the first pin of the reference source TLZ1000, the second pin of the reference source TLZ1000 is connected to the anode of the diode D17, and the diode D17 The negative pole is grounded, the base of the transistor Q3 is connected to one end of the resistor R63, the other end of the resistor R63 is connected to the seventh pin of the operational amplifier LT1013, the sixth pin of the operational amplifier LT1013 is grounded through the resistor R71, and the sixth pin of the operational amplifier LT1013 is connected to the reference source through the resistor R64 The sixth pin of TLZ1000, the fifth pin of the operational amplifier LT1013 is connected to the eighth pin of the reference source TLZ1000, the fifth pin of the operational amplifier LT1013 is grounded through the capacitor C54, the four...

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Abstract

The invention relates to a voltage reference circuit, which comprises a reference chip TLZ1000, an operational amplifier LT1013, a constant-current source circuit, a temperature-compensation circuit, a pull-up resistor, a filter capacitor, a current-limiting resistor, a protection diode and a distribution circuit. Supply of 5V reference voltage is realized by utilizing few electronic components; because of the temperature-compensation circuit, the stability is greatly ensured, and precisely and stably output 5V reference voltage can be obtained.

Description

technical field [0001] The present invention relates to a reference circuit, in particular to a reference circuit providing accurate and reliable voltage. Background technique [0002] In integrated circuits consisting of multiple electronic circuits, voltage reference circuits are required to provide reliable voltage values. However, in the existing voltage reference circuit, since there are many electronic components involved, it is easily affected by temperature, so the output voltage is unstable, which will not only affect the stability of the circuit operation, but also reduce the service life of the chip. . Contents of the invention [0003] In order to solve the above problems, the present invention provides a voltage reference circuit with temperature compensation function, which can greatly improve the stability of the output voltage. [0004] The present invention adopts the following technical solutions: a voltage reference circuit, including a triode Q3, t...

Claims

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Application Information

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IPC IPC(8): G05F1/567
Inventor 李钢
Owner 李钢
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