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Hopping detector and control circuit of clock frequency adjusting system

A frequency control and detector technology, applied in logic circuits, electrical components, reliability improvement and modification, etc., can solve problems affecting system performance, etc., and achieve the effect of wide application range, area cost and power consumption cost reduction

Pending Publication Date: 2018-01-09
NANJING UNIV OF POSTS & TELECOMM INST AT NANJING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

3. The load at the end of the original critical path should be as small as possible, because if the load is too large, the critical path will become more critical and affect system performance

Method used

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  • Hopping detector and control circuit of clock frequency adjusting system
  • Hopping detector and control circuit of clock frequency adjusting system
  • Hopping detector and control circuit of clock frequency adjusting system

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Experimental program
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Embodiment Construction

[0018] The technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings, but the protection scope of the present invention is not limited to the embodiments.

[0019] The invention mainly monitors the timing of the critical path in the integrated circuit, and the jump detector is inserted into the end trigger of the critical path to form a timing monitoring unit to monitor whether the timing of the critical path is tense. The timing monitoring solution described in the invention requires a clock duty ratio adjustment circuit to shorten the low-level time of the clock. Therefore, if the input data Din jumps during the low period of the clock (before the next rising edge), it means that the timing of the circuit at this time is already tight, and may even cause an error when it arrives in the next clock cycle. Usually jumps, indicating that the timing is relatively loose and the data is normal. Traditional transiti...

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PUM

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Abstract

The invention discloses a hopping detector including a first PMOS tube, a first NMOS tube, a CMOS transmission gate, an inverter and an exclusive-OR gate. The hopping detector can be used for online time sequence monitoring and is used for monitoring whether input data arrives late or not, namely, arrives after a clock hopping edge. Compared with a traditional hopping detector, the hopping detector provided by the invention is simple in structure. The hopping detector has only 16 crystal transistors, so that the area of the hopping detector is reduced substantially. The near-threshold wide voltage hopping detector cooperates with a trigger in working and the input terminal of the hopping detector is connected with the input terminal of the trigger. Data hopping can be monitored effectivelyin a detection window and time sequence early warning signals can be output. Besides, the invention also discloses a time sequence early warning control system including a dynamic OR gate, a frequency control state machine and a phase-locked loop.

Description

technical field [0001] The invention relates to the technical field of integrated circuit design low power consumption, in particular to the technical field of self-adaptive voltage frequency adjustment based on online timing monitoring. Background technique [0002] With the development of the integrated circuit (Integrated Circuit, IC) industry, electronic products have played an increasingly important role in people's lives, especially in the field of mobile terminals. Due to the continuous improvement of people's performance requirements for electronic products, the resulting The problem of power consumption is becoming more and more obvious, so performance has become a major goal of integrated circuit design. Performance refers to the energy consumed by each operation. The lower the performance, the higher the energy utilization efficiency. Research shows that when the voltage decreases, the performance will also decrease, and the best performance point is in the near-t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/003H03K19/00
Inventor 蔡志匡单伟伟肖建
Owner NANJING UNIV OF POSTS & TELECOMM INST AT NANJING CO LTD