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

Abstract

The 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 comprises a switch tube module, a control end drive module and a delay chain; the switch tube module at least comprises n stages of switch tubes connected in parallel, the control end drive module at least comprises n stages of drivers, the output end of each driver is connected with the control end of the corresponding switch tube to be used for driving the corresponding switch tube, and the delay chain at least comprises n-1 stages of delay modules in series, wherein the input end of the first stage of delay module and the input end of the first stage of driver are jointly connected into a control logic input signal, and the output end of the (n-1)th stage of delay module is connected with the input end of the nth driver. By means of the on-chip switch step-by-step control circuit, the current change rate can be effectively reduced; in addition, on the premise that the current change rate is equally reduced, the shortest closing or opening process is achieved, and the switching 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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