Level conversion circuit and electronic equipment

Abstract

The embodiment of the invention discloses a level conversion circuit and electronic equipment which are used for solving the problem that a level conversion circuit hangs due to a failed device. The level conversion circuit comprises a level input unit, a charging and discharging unit, a switch unit and a level output unit; the first end of the switch unit is connected with the level input unit, the second end of the switch unit is connected with the first end of the charging and discharging unit, the third end of the switch unit is connected with the second end of the charging and dischargingunit and the level output unit, and the third end of the charging and discharging unit is grounded; and when the level input unit inputs the high level and a load connected with the third end of theswitch unit pulls the voltage of the third end of the switch unit to the low level, the charging and discharging unit charges before the switch unit is cut off, and when the voltage of the charging and discharging unit is lower than the preset voltage, the switch unit is cut off.

Description

technical field [0001] The present application relates to electronic technology, in particular to a level conversion circuit and electronic equipment. Background technique [0002] In a pipelined analog-to-digital converter, it is usually applied to a level conversion circuit to realize high and low level signal conversion. Wherein, the level conversion circuit includes an integrated circuit bus (Inter-Intergrated Circuit, IIC) level conversion circuit. [0003] At present, the IIC level shifting circuit is built by discrete devices, and the external device connects its data line and clock line to the data line of the IIC bus and the clock line of the IIC bus in the IIC level shifting circuit respectively. The level input terminal in the level conversion circuit inputs high and low levels to realize level conversion. [0004] However, since the external device connects its data line and clock line to the data line of the IIC bus and the clock line of the IIC bus in the IIC...

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Problems solved by technology

[0004] However, since the external device connects its data line and clock line to the data line of the IIC bus and the clock line of the IIC bus in the IIC level shifting circuit respectively, when an abnormality occurs in one of the external devices, it will Pull down the level of the entire IIC bus

Then when the level input terminal inputs a high level, the level output terminal is always at a low level due to the abnormality of the external device at this time, causing the switch tube in the level conversion circuit to be in a conductive state all the time, and the entire level conversion circuit The level of the entire IIC bus is always in a low level state, so the level conversion circuit is in a dead state and cannot work normally.

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