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Frequency division device and related method

A technology of frequency dividing device and control device, which is applied in the directions of synchronous pulse counter, pulse technology, counting chain pulse counter, etc., can solve the problem of inability to switch dual-mode prescaler in time, and achieve the effect of improving the working speed.

Active Publication Date: 2019-01-01
MEDIATEK INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, when a control signal triggers a dual-mode prescaler to switch from a first factor to a second factor, the control signal may not switch the dual-mode prescaler in time in a low supply voltage and high frequency environment

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  • Frequency division device and related method
  • Frequency division device and related method
  • Frequency division device and related method

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Embodiment Construction

[0015] Certain terms are used in the description and claims to refer to particular elements. Those skilled in the art should understand that manufacturers of electronic devices may use different terms to refer to the same component. The specification and claims do not use the difference in name as a way to distinguish components, but use the difference in function of components as a criterion for distinguishing. The "comprising" mentioned throughout the specification and claims is an open term, so it should be interpreted as "including but not limited to". Otherwise, the term "coupled" includes any direct and indirect means of electrical connection. Therefore, if it is described herein that a first device is coupled to a second device, it means that the first device may be directly electrically connected to the second device, or indirectly electrically connected to the second device through other devices or connection means.

[0016] Please refer to figure 1 , which is a sc...

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Abstract

A frequency dividing apparatus includes: a plurality of latching devices arranged to selectively generate an output signal having a first oscillating frequency or a second oscillating frequency different from the first oscillating frequency according to an input clock signal and a first reset signal; and a controlling device arranged to generate the first reset signal at least according to a programming input signal; wherein the first reset signal is arranged to reset a first latching device in the plurality of latching devices to make the plurality of latching devices to generate the output signal having the second oscillating frequency.

Description

【Technical field】 [0001] The present invention relates to a frequency division device and a related method, more particularly, to a high-speed dual-modulus prescaler (dual-modulus prescaler) and a related method. 【Background technique】 [0002] Frequency dividers are often used to convert a high frequency clock signal to a low frequency clock signal. For example, frequency dividers can be used in the feedback loop of a frequency synthesizer. A conventional frequency divider includes multiple cascaded dual-mode prescalers, and each dual-mode prescaler has two different frequency factors. By individually controlling each of the plurality of cascaded dual-modulus prescalers to operate below one of the factors, the divider is capable of converting a high frequency clock signal to a low frequency clock with an adjustable overall factor Signal. However, in modern semiconductor manufacturing techniques, some dual-mode prescalers may not work properly when low supply voltages are...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K21/02H03K23/42
CPCH03K23/667H03K21/38
Inventor 邱威豪林昂生王崑印
Owner MEDIATEK INC