A high-speed large-swing divide-by-two frequency divider circuit based on current-mode logic

A technology of current mode logic and two frequency dividers, which is applied in the direction of electrical components and automatic power control, etc., can solve the problems of multi-chip area and extra power consumption, achieve wide frequency input range, reduce complexity and power consumption low effect

Inactive Publication Date: 2011-12-21
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

In the end, this will make the entire dual-mode frequency divider generate some additional power consumption and occupy more chip area

Method used

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  • A high-speed large-swing divide-by-two frequency divider circuit based on current-mode logic
  • A high-speed large-swing divide-by-two frequency divider circuit based on current-mode logic
  • A high-speed large-swing divide-by-two frequency divider circuit based on current-mode logic

Examples

Experimental program
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Embodiment

[0021] This embodiment has and attached image 3 , 4 The circuit shown has exactly the same circuit structure. The components and circuit parameters of this embodiment are listed as follows:

[0022] The capacitances of the first capacitor C1 and the second capacitor C2 are 2.45544 pF and 2.45544 pF, respectively.

[0023] The resistances of the first resistor R1 and the second resistor R2 are respectively: 1.13398 KΩ and 1.13398 KΩ.

[0024] The first MOS tube M1, the second MOS tube M2, the third MOS tube M3, the fourth MOS tube M4, the fifth MOS tube M5, the sixth MOS tube M6, the seventh MOS tube M7, the eighth MOS tube M8, and the ninth MOS tube The aspect ratio (W / L) of MOS tube M9, tenth MOS tube M10 and eleventh MOS tube M11 are: 140um / 0.2um, 140um / 0.2um, 9um / 0.18um, 9um / 0.18um, 8.2 um / 0.18um, 8.2um / 0.18um, 9um / 0.18um, 9um / 0.18um, 18um / 0.18um, 18um / 0.18um, 280um / 0.2um.

[0025] The components and circuit parameters of the second D flip-flop D2 and the first D flip-flop D1 are...

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Abstract

The invention discloses a high speed high-oscillation amplitude divide-by-two frequency divider circuit, which belongs to the technical fields of integrated circuit designing and signal processing. Specifically, the circuit mainly comprises two high speed high-oscillation amplitude D triggers which are cascaded. The D trigger of each stage eliminates the bias of a tail current source based on theconventional D trigger having a current-mode logic (CML) structure, and adopts a P-channel metal oxide semiconductor (PMOS) transistor as a load; and simultaneously, a PMOS and N-channel metal oxide semiconductor (NMOS) complementary cross coupling pair structure and the like are adopted by the output stage of the circuit to finally achieve the aims of increasing the oscillation amplitude of an output signal and making the oscillation amplitude of the output signal approximate to full oscillation amplitude under the condition of ensuring the high speed working of the circuit. The circuit not only can directly drive a post circuit, reduces system power consumption to a certain extent, compensates for the shortcomings of a conventional divide-by-two frequency divider, and is suitable for a high speed frequency divider part in a low-power consumption preposed dual-mode prescaler front-end without any additional level conversion amplification circuit.

Description

Technical field [0001] The invention belongs to the technical field of integrated circuit design and signal processing, and specifically relates to a high-speed large swing divide-by-two frequency divider circuit based on current-mode logic that works at 2.5GHz-5.5GHz, and is mainly applied to ultra-high frequency wireless communication systems. Frequency synthesizer. Background technique [0002] In recent years, driven by the rapid development of the integrated circuit industry, wireless communication technology has undergone rapid changes. Wireless communication technology is widely used in mobile phones, wireless local area networks (WLAN), ultra-high frequency radio frequency identification (UHF RFID), global positioning system (GPS), etc., and various standard protocols and technical applications are endless. The wireless communication system is also developing in the direction of faster and faster transmission rate, higher and higher security performance, and better and b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/18
Inventor 李征张润曦谢淼黄龙赖宗声
Owner EAST CHINA NORMAL UNIV
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