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Low-dropout linear voltage-regulating circuit

A low-dropout linear, voltage-stabilizing circuit technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of slow response speed, unstable output voltage, poor picture effect, etc., and achieve good picture effect. Effect

Inactive Publication Date: 2010-12-22
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, due to the fast charge transfer speed on the CCD system, when the circuit load changes or the CCD system is switched on / off, the existing low-dropout linear regulator circuit has an unstable output due to its slow response. The output voltage of the CCD system will cause the CCD system to transmit the charge in an unstable state, so that the picture effect obtained by the CCD system is not good.

Method used

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Embodiment Construction

[0010] The embodiments of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0011] see figure 1 , which is a circuit diagram of a low-dropout linear regulator circuit 10 provided in an embodiment of the present invention. The LDO voltage regulator circuit 10 includes a LDO regulator 110 , a capacitor C1 , a voltage stabilizing resistor R1 and a first output terminal O1 . The first output terminal O1 is connected to a CCD system (not shown).

[0012] The low dropout linear regulator 110 includes an input terminal S1 , a second output terminal O2 and a ground terminal G1 . The low dropout linear regulator 110 receives an external DC power supply through the input terminal S1 and converts the voltage value of the DC power supply to a predetermined value. In this embodiment, the voltage value of the connected external DC power supply is 4.3 volts (V), and the converted output voltage V out The value is 3.1 volts (V...

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Abstract

The invention relates to a low-dropout linear voltage-regulating circuit used for providing a voltage for a CCDS (Charge-Coupled Devices System). The low-dropout linear voltage-regulating circuit comprises a low-dropout linear voltage regulator, a capacitor, a voltage-regulating resistor and a first output end which is connected with the CCDS, the low-dropout linear voltage regulator comprises a second output end and used for accessing a DC power supply and converting the voltage value of the DC power supply so as to output to the first output end through the second output end, one end of the capacitor is connected between the first output end and the second output end, and the other end of the capacitor is ground through the voltage-regulating resistor which is connected in series with the capacitor so that the first output end of the low-dropout linear voltage-regulating circuit surely outputs a stable voltage, the CCDS using the low-dropout linear voltage-regulating circuit can acquire good picture effect.

Description

technical field [0001] The present invention relates to a voltage stabilizing circuit, in particular to a low dropout linear regulator (Low Drop-OUT linear regulator, LDO) applied to a charge coupled device (Charge Coupled Device, CCD) camera. Background technique [0002] At present, in CCD cameras, it is generally necessary to use a low-dropout linear voltage regulator circuit to convert the DC voltage to adjust the voltage to a voltage suitable for the CCD, while avoiding the impact of instantaneous current changes on the CCD. [0003] However, due to the fast charge transfer speed on the CCD system, when the circuit load changes or the CCD system is switched on / off, the existing low-dropout linear regulator circuit has an unstable output due to its slow response. The output voltage of the CCD system will cause the CCD system to transmit the charge in an unstable state, so that the picture effect obtained by the CCD system will not be good. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): G05F3/08
Inventor 张博顺
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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