Latch and frequency divider

Abstract

The invention provides a latch and a frequency divider. The latch comprises a first logic unit coupled between a power supply and a ground wire, a second logic unit in structure symmetry with the first logic unit, and an input feedforward control unit, wherein the first logic unit is provided with a first control end, a first input end and a first output end; the second logic unit is provided with a second control end, a second input end and a second output end; and the input feedforward control unit is suitable for controlling the closing of a current channel in the first logic unit or the second logic unit according to input signals of the first input end and the second input end. By adopting the above scheme, the power consumption of the latch under a static work condition is eliminated, and the dynamic power consumption under a dynamic work condition is simultaneously lowered.

Description

technical field [0001] The invention relates to the technical field of semiconductors, in particular to a latch and a frequency divider. Background technique [0002] With the development of communication technology, the high-speed frequency divider based on the razavi structure latch has been widely used because of its advantages of fast speed and wide bandwidth. [0003] The high-speed frequency divider circuit for frequency division by two is composed of two stages of latches, any one of which is the subsequent unit of the other latch. [0004] However, when the control signal input by the control terminal of the latch of the high-speed frequency divider circuit in the prior art is at a low level, no matter it is under static working conditions or under dynamic working conditions, there is a power-to-ground fault. current path between wires. It can be seen from the above that the latches used in the high-speed frequency divider circuit in the prior art have the problem ...

AI Technical Summary

Problems solved by technology

[0004] However, when the control signal input by the control terminal of the latch of the high-speed frequency divider circuit in the prior art is at a low level, no matter it is in a static working condition or in a dynamic working condition, there is a power-to-ground fault. current path between wires

It can be seen from the above that the latches used in the high-speed frequency divider circuit in the prior art have the problem of large power consumption

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