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Multi-modulus divider and basic frequency division units of multi-modulus divider

A technology of multi-mode frequency divider and frequency division unit, which is applied in the direction of electrical components, pulse technology, automatic power control, etc. The effect of bandwidth

Active Publication Date: 2017-03-29
CALTERAH SEMICON TECH SHANGHAI CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When the frequency of the frequency division input signal reaches a certain value, the insufficient pulse width of the mode input signal will cause the three-frequency division function of the basic frequency division unit to fail to be realized. Therefore, the pulse width of the mode input signal can affect the locking of the frequency divider bandwidth

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  • Multi-modulus divider and basic frequency division units of multi-modulus divider
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Embodiment Construction

[0030] Hereinafter, the present invention will be described in more detail with reference to the accompanying drawings. In the various figures, identical elements are indicated with similar reference numerals. For the sake of clarity, various parts in the drawings have not been drawn to scale. Also, some well-known parts may not be shown in the drawings.

[0031] In the following, many specific details of the present invention are described, such as device structures, materials, dimensions, processing techniques and techniques, for a clearer understanding of the present invention. However, the invention may be practiced without these specific details, as will be understood by those skilled in the art.

[0032] Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

[0033] figure 1 A schematic block diagram of an existing multimode frequency divider is shown.

[0034] Such as figure 1 As shown, the multimode frequency ...

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Abstract

The invention discloses a multi-modulus divider and the basic frequency division units of the multi-modulus divider. The multi-modulus divider is cascaded by a plurality of basic frequency division units. The basic frequency division units are used for reducing the frequency of the frequency division input signal according to the mode input signal and the control bit signal. The basic frequency division unit comprises four latches, and the basic frequency division unit also comprises a pulse width regulating circuit which is used for increasing the pulse width of the mode input signal. The basic frequency division units of the multi-modulus divider disclosed by the invention can broaden the pulse width of the mode input signal, and the basic frequency division units can output the correct frequency division output signal in the three frequency division mode while the pulse width of the mode input signal received by the basic frequency division units is not enough, therefore, the multi-modulus divider which is cascaded by the basic frequency division units can perform frequency division on the frequency division iutput signal with a higher frequency, so a wider locking bandwidth is realized.

Description

technical field [0001] The present invention relates to the technical field of electronic circuits, and more specifically, to a multimode frequency divider and a basic frequency division unit thereof. Background technique [0002] The frequency divider is one of the core modules of wired and wireless transceivers, and is widely used in high-speed communications and circuits. Its main function is to generate an output signal from an input signal according to a certain frequency division ratio. A multi-modulus divider (Multi-modulusDivider, MMD) is a programmable frequency divider, which can obtain various frequency division ratios through programming, thereby generating output signals of various frequencies. Multi-mode frequency dividers are usually used in the feedback branch of the phase-locked loop to complete the switching between channels. [0003] The multi-mode frequency divider can be formed by cascading basic frequency division units, and each basic frequency divisi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03L7/193H03K21/10
CPCH03K21/10H03L7/193
Inventor 马顺利陈嘉澍
Owner CALTERAH SEMICON TECH SHANGHAI CO LTD
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