A bod circuit

Abstract

The present invention provides a BOD circuit, the third to sixth PMOS transistors and the second and third NMOS transistors; wherein the source of the third PMOS transistor and the source of the sixth PMOS transistor are commonly connected to the power supply voltage; the third PMOS transistor The drain is connected to the source of the fourth PMOS transistor; the gates of the third and fourth PMOS transistors are connected to each other; the drain of the fourth PMOS transistor is connected to the source of the fifth PMOS transistor; the gate of the fifth PMOS transistor and The drain, the gate of the sixth PMOS transistor are connected to the drain, the gate of the second NMOS transistor, and the gate of the third NMOS transistor; the drain of the sixth PMOS transistor is connected to the drain of the third NMOS transistor; 2. The source of the third NMOS transistor is commonly grounded; the signal output terminal of the BOD circuit is between the drain of the sixth PMOS transistor and the drain of the third NMOS transistor. The BOD circuit of the present invention is improved on the basis of the traditional BOD circuit, and the reference current generating circuit and the current mirror circuit of the traditional BOD circuit are combined, which can effectively reduce power consumption and occupy an area, and is conducive to improving production capacity.

Description

technical field [0001] The invention relates to the field of circuit design, in particular to a BOD circuit. Background technique [0002] Such as figure 1 as shown, figure 1 It is a traditional BOD circuit, including the first to sixth PMOS transistors, the first to third NMOS transistors and two inverting amplifiers. Wherein, the sources of the first, third and sixth PMOS transistors are connected to the power supply voltage VPWR together, the source of the second PMOS transistor is connected to the drain of the first PMOS transistor, and the drain of the third PMOS transistor is connected to the drain of the fourth PMOS transistor. The sources of the fourth PMOS transistor are connected to each other; the drain of the fourth PMOS transistor is connected to the source of the fifth PMOS transistor; the gates of the fifth and sixth PMOS transistors are connected to the drain of the second NMOS transistor; the drain of the sixth PMOS transistor pole is connected with the d...

AI Technical Summary

Problems solved by technology

[0005] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide a BOD circuit for solving the problems of high power consumption and large occupied area of ​​traditional BOD circuits in the prior art

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