A circuit for reducing output power supply drop amplitude. The circuit comprises an RC circuit, a triode level regulator, and a PMOS transistor switch. An input end of the RC circuit is connected to a control signal, and an output end is connected to the triode level regulator; the triode level regulator is connected to the PMOS transistor switch; the triode level regulator and the PMOS transistor switch are separately connected to an input voltage; and the PMOS transistor switch outputs a voltage signal. Power supply drop of the output end is reduced by the simple circuit, so that a power supply outputs a stable voltage during switching; the drop of the output voltage can be mitigated, the input voltage is isolated from a control signal voltage, and circuits with different signal levels can be mutually controlled; the application of a switching circuit is maximized, the switching circuit can be more flexibly applied to circuit modules with different voltage levels, and the application range of a power supply switching circuit is increased.

Circuit for reducing output power supply drop amplitude

The invention discloses a circuit capable of reducing output power supply drop amplitude. The circuit comprises a RC circuit, a triode level regulator and a PMOS transistor switch, wherein an input end of the RC circuit is connected with a control signal, an output end is connected with the triode level regulator, the triode level regulator is connected with the PMOS transistor switch, the triodelevel regulator and the PMOS transistor switch are connected with an input voltage, and the PMOS transistor switch outputs a voltage signal. Power supply drop of the output end is reduced by the simple circuit, so that a power supply outputs the stable voltage during switching; the drop of the output voltage can be improved, the input voltage is isolated from the control signal voltage, and circuits with different signal levels can be mutually controlled, the application of a switching circuit is maximized, the switching circuit can be more flexibly applied to circuit modules with different voltage levels, and the application range of the power supply switching circuit is increased.

Circuit capable of reducing output power supply drop amplitude

Disclosed is a method for detecting a block with an instable electrical property in a flash memory, the method relating to a control chip (1), a software program module (2) and a flash memory chip (3), wherein the control chip (1) is in signal connection with the software program module (2) and the flash memory chip (3) respectively. The method comprises: firstly writing test data into the first page of all blocks; then erasing all the blocks; writing the test data into all the pages of all the blocks; and finally comparing the data in all the pages of all the blocks and obtaining a bad block table according to a result. The method has a simple principle, realizes high work efficiency and can find a bad block with data written into the block being error-prone due to the fact that erasure is performed when the number of pages written does not exceed six.

Method for detecting block with instable electrical property in flash memory

A method for detect an electrically unstable block in a flash memory include a control chip, A software program module and a flash memory chip are respectively connected with the software program module and the flash memory chip by a control chip. First, the test data are written into the first page of all blocks, then all blocks are erased, the test data are written into all pages of all blocks,and finally, the data in all pages of all blocks are compared, and a bad block table is obtained according to the result. The invention has the advantages of simple principle and high working efficiency, and can find out the bad blocks which are easy to be erased when the number of pages written does not exceed 6 pages and the data written in the blocks are easy to be wrong.

Method for detecting electrically unstable blocks in flash memory

The invention discloses a filtering method for a USB3.0 flash drive. The USB3.0 flash drive which comprises an analogical power supply port connected with a power supply, and a voltage stabilization capacitor for connecting the power supply and the analogical power supply port; a resistance element is connected between the voltage stabilization capacitor and the power supply in series. The invention further discloses a filtering circuit of the USB3.0 flash drive; the filtering circuit comprises the resistance element which is connected between the voltage stabilization capacitor and the powersupply in series. By adopting the filtering method and the filtering circuit, noises can be effectively reduced in a limited space.

Filtering method and filtering circuit for USB3.0 flash drive

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