An enabling control circuit and electronic equipment

Abstract

The present application discloses an enabling control circuit and electronic equipment, the enabling control circuit includes: a current source generation module, a third branch and an output module, the current source generation module includes a first branch and a second branch way, the third current generated in the third branch and the first current generated in the first branch are mirror images of each other, because the first branch and the second branch have the same positive temperature coefficient or the same It is a negative temperature coefficient, which eliminates the influence of temperature changes on the currents generated in the first branch, the second branch and the third branch.

Description

technical field [0001] The present application relates to the technical field of circuit design, and more specifically, to an enabling control circuit and electronic equipment. Background technique [0002] In the field of semiconductor technology, the enable signal terminal of the chip is an input port that controls the work or shutdown of the chip. For example, when the enable signal terminal of the chip receives a high level, the chip starts to work, and when the enable signal terminal of the chip receives a low level level, the chip stops working. [0003] The circuit that provides the enable signal for the enable signal terminal of the chip is called the enable control circuit. The enable control circuit receives the working power supply and the input signal. Before the input signal reaches the set value, the enable control circuit does not output a valid signal. The enable signal (for example, output low level), when the input signal reaches the set value, the enable ...

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Problems solved by technology

[0004] However, the inventor found in the actual use process that due to the influence of temperature, device process angle, etc., the flipping level of the enable control circuit will fluctuate with the change of temperature, resulting in the failure of some enable control circuits in the prior art. It cannot be applied to circuits that require high precision for flipping levels (such as undervoltage protection circuits)

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