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Voltage conversion circuit

A technology of voltage conversion circuit and voltage output, which is applied in the direction of conversion equipment without intermediate conversion to AC, which can solve the problems affecting the normal operation of the load unit 104, and achieve the effect of reducing amplitude jitter

Active Publication Date: 2014-08-13
SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the voltage regulator is a feedback-type working process, it often takes a certain feedback delay for the output voltage Vout to return to the predetermined voltage value from the initial drop. Therefore, after the load unit 104 starts to work, the voltage curve of the output voltage Vout appears toward The lower amplitude jitter affects the normal operation of the load unit 104

Method used

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Embodiment Construction

[0029] In order to make the above objects, features and advantages of the present invention more obvious and comprehensible, specific implementations of the present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0030] In the voltage conversion circuit of the prior art, the output voltage of the voltage regulator is used as the control voltage of the load unit. When the load unit starts to work, the output load of the entire voltage regulator changes, and due to the feedback delay of the voltage regulator, The output voltage of the voltage regulator produces amplitude jitter, which affects the normal operation of the load unit.

[0031] In the technical solution of the present invention, a discharge unit is added to the voltage conversion circuit. Before the load unit starts to work, the voltage output terminal of the voltage regulator passes through the discharge unit to discharge the discharge current with a preset...

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Abstract

The invention discloses a voltage conversion circuit, which is used for providing a voltage for a load unit. The voltage conversion circuit comprises a voltage regulator, wherein the voltage regulator comprises a voltage output end, regulates a reference voltage, generates an output voltage and outputs the output voltage to the voltage output end; and the voltage output end discharges a bleeder current with a preset current value when the load unit does not work, and stops discharging the bleeder current when the load unit works. The voltage conversion circuit reduces the amplitude perturbations of the output voltage of the voltage output end, and ensures the normal working of the load unit.

Description

technical field [0001] The invention relates to a voltage conversion circuit. Background technique [0002] Multiple precise voltages are often required inside the chip, which are used as control signals or reference voltage signals for different modules, such as programming voltages and erasing voltages in flash memory. The voltage conversion circuit in the prior art generally uses a reference voltage source to generate a reference voltage, and then uses a voltage regulator (regulator) to adjust the reference voltage to generate an output voltage with a corresponding voltage value according to the requirements of different modules. [0003] figure 1 A schematic diagram of a voltage conversion circuit in the prior art is shown. A voltage regulator is used to adjust a reference voltage Vref generated by a reference voltage source to generate an output voltage Vout. The voltage regulator includes: an operational amplifier 101, a driving unit 102 and Feedback unit 103. The o...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02M3/08
Inventor 杨光军
Owner SHANGHAI HUAHONG GRACE SEMICON MFG CORP
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