Dynamic bias current generator and related electronic device

Abstract

The invention discloses a dynamic bias current generator and a related electronic device. The dynamic bias current generator comprises a detection circuit and a current generation circuit. The detection circuit detects a power supply voltage to generate a detection signal, and comprises a current source and a first group of transistors located on a first path; a second group of transistors on thesecond path, control terminals of respective transistors of the first and second groups of transistors being coupled to each other; a first capacitor coupled to the supply voltage and other terminalsof the transistors in the second set of transistors; and a second capacitor coupled to control terminals of respective transistors of the first and second groups of transistors and a ground voltage. The current generation circuit includes: a plurality of transistors that generate a dynamic bias current according to a detection signal. The dynamic bias current can be used for increasing the reaction speed of the comparator and used in a power-down reset detection circuit. The advantages of the dynamic bias current generator are that the dynamic bias current generator enables the electronic device to obtain low power consumption and high speed performance at the same time.

Description

technical field [0001] The invention relates to low power consumption circuit design, in particular to a dynamic bias current generator and related electronic devices. Background technique [0002] Reset (reset) control mechanisms such as power-on reset (power-on reset, POR), power-down reset (powerdown reset, PDR), brown-out reset (brown-out reset, BOR), etc. are very important in circuit design. important topic. For example, when powering up an electronic system, it takes a certain length of time for the power supply to stabilize the voltage and reach its steady state value. During such transitions, if no reset command is provided, it is generally not possible to define the initial state of the storage elements and thus the circuit behavior of the entire electronic system. [0003] According to the related art, when attempting to directly apply the reset control mechanism to the design of low power consumption circuits, some disturbing problems are often encountered. Fo...

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Problems solved by technology

Therefore, low power consumption and high-speed performance cannot be obtained at the same time in the related art.

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