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Latch and frequency divider

A latch and transistor technology, applied in pulse technology, logic circuits, electrical components, etc., can solve the problem of high circuit power consumption, and achieve the effect of reducing power consumption and reducing power consumption

Active Publication Date: 2017-01-11
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] But, the inventor finds in research and practice process: for some reasons, the power consumption of the existing Wang structure two frequency divider circuit is still relatively large

Method used

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  • Latch and frequency divider

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0081] refer to figure 1 , a schematic structural diagram of a high-speed divide-by-two circuit in the prior art is given, including latches 101 and 102 .

[0082] Both the latch 101 and the latch 102 are D flip-flops, the terminals D and Dn are both input terminals, and the terminals Q and Qn are both output terminals. A clock signal CK is input to the clock signal input terminal CLK of the latch 101 , and a clock signal CKb is input to the clock signal input terminal CLK of the latch 102 , and the clock signal CK and the clock signal CKb are inverted.

[0083] The D terminal of the latch 101 is coupled to the Qn terminal of the latch 102, the Q terminal is coupled to the D terminal of the latch 102, the Dn terminal is coupled to the Q terminal of the latch 102, and the Qn terminal is connected to the latch 102. The Dn end of 102 is coupled. That is: the input end of the latch 101 is coupled to the output end of the latch 102 respectively, the output end of the latch 101 is...

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Abstract

The invention provides a latch and a frequency divider. The latch comprises a first logic unit, a second logic unit, a first control unit, a second control unit, a third control unit and a fourth control unit. The first logic unit and the second logic unit are coupled between a power supply and a ground wire and are symmetrical. The first control unit, the first logic unit and the third control unit forms an access. The second control unit, the second logic unit and the fourth control unit forms an access. At least one of the control units is suitable for controlling an access between the power supply and the ground wire to be switched on or off. By use of the latch and the frequency divider, power consumption of a Wang-structured two-frequency divider can be effectively reduced.

Description

technical field [0001] The invention relates to the field of digital circuits, in particular to a latch and a frequency divider. Background technique [0002] With the rapid development of mobile communication technology, improving the speed of mobile communication terminal radio frequency circuit and reducing the power consumption of radio frequency circuit have become the focus of the existing mobile communication technology research. [0003] As the basic module of the frequency divider, the divide-by-two circuit is one of the key circuits of the radio frequency circuit. The high-speed frequency divider circuit is composed of two stages of latch circuits, any one of which is the subsequent unit of the other latch circuit. In conventional divider circuits, the latch circuits are driven by the same clock. In the Wang structure frequency divider circuit, the latch circuit is driven by a complementary clock signal. Compared with the traditional frequency divider circuit, t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/094H03K21/00
Inventor 吴毅强
Owner SPREADTRUM COMM (SHANGHAI) CO LTD