On-chip switch step-by-step control circuit and method, on-chip signal pin drive circuit

Abstract

The present invention provides an on-chip switch step-by-step control circuit and method, and an on-chip signal pin drive circuit. The on-chip switch step-by-step control circuit at least includes: a switch tube module, and the switch tube module includes at least n stages of switch tubes connected in parallel. The control terminal drive module, the control terminal drive module at least includes n-level drivers, and the output terminals of the drivers at all levels are connected to the control terminals of the switch tubes at all levels respectively, and are used to drive the switch tubes at all levels; the delay chain, the delay chain The time chain includes at least n-1 delay modules connected in series, wherein the input end of the first-stage delay module and the input end of the first-stage driver are jointly connected to a control logic input signal, and the n-1th stage delay The output terminal of the module is connected with the input terminal of the nth level driver. The on-chip switch step-by-step control circuit of the present invention can effectively reduce the current change rate, and has the shortest turn-on or turn-off process on the premise of reducing the current change rate, so that the switch speed can be maximized.

Description

technical field [0001] The invention relates to the technical field of large-scale integrated circuit design, in particular to an on-chip switch step-by-step control circuit and method, and an on-chip signal pin drive circuit. Background technique [0002] With the improvement of the integration level of modern chips, more and more signal pins need to be driven on the same chip. The loads to be driven by these signal pins may be different. For example, ordinary CMOS digital signal pins drive capacitors, switching power supply signal pins drive inductors, and high-speed interface DDR signal pins drive transmission lines with resistive loads. But no matter what kind of load it is, the essential function of the output stage switch control circuit is to quickly switch the current between the signal pin and the power line or ground line. And all these current switches will face a common problem, which is the disturbance to the power line (or ground line) in the chip. [0003] S...

AI Technical Summary

Problems solved by technology

[0010] In view of the shortcomings of the prior art described above, the purpose of the present invention is to provide an on-chip switch step-by-step control circuit and method, and an on-chip signal pin drive circuit, which are used to solve the problem that the current rate of change cannot be effectively reduced in the prior art, thereby It cannot reduce the interference of self-inductance electromotive force, but increases the time of the turn-on or turn-off process, resulting in the problem of reduced switching speed

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