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Clock signal generator and electronic equipment

A clock signal and generating device technology, applied to electrical components, transforming continuous pulse chains into pulse chain devices with required modes, automatic power control, etc., can solve problems such as increasing chip area and signal interference

Active Publication Date: 2018-04-27
SPREADTRUM COMM (SHANGHAI) CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When signals of other frequencies need to be generated, the frequency of the clock signal can only be changed by increasing or decreasing the current source or capacitance inside the clock signal generating device, which increases the area of ​​the chip
Moreover, each adjustment operation can only change the frequency of the clock signal in a limited frequency domain, that is, the frequency of the generated clock signal is relatively concentrated, and it will still interfere with other surrounding frequency signals

Method used

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  • Clock signal generator and electronic equipment
  • Clock signal generator and electronic equipment
  • Clock signal generator and electronic equipment

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Embodiment Construction

[0018] When the existing clock signal generating device needs to generate clock signals with different frequencies, the frequency of the clock signal can only be changed by changing the current source or capacitance inside the clock signal generating device. For example, a current source can be added, which in turn increases the current used to generate the clock signal, thereby increasing the frequency of the generated clock signal. However, changing the frequency of the clock signal through the above method not only increases the area of ​​the chip, but also changes the frequency of the clock signal only in a limited frequency domain for each changing operation, which is difficult to meet the needs of users.

[0019] In view of the above problems, the embodiment of the present invention provides a clock signal generating device, the device constitutes a ring oscillator circuit by using inverters connected end to end in sequence, and an adjustable resistance is installed betwe...

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Abstract

A clock signal generating device and electronic equipment. The device includes: a controller and more than three inverters connected end-to-end in sequence, any two adjacent inverters form an inverter pair, and between the two inverters in at least one inverter pair Adjustable resistors are arranged between them, and one end of any one of the adjustable resistors is connected to the output end of one inverter in the pair of inverters, and the other end is connected to the other inverter in the pair of inverters. The input end of the phase device is connected, and the controller controls the resistance value of the adjustable resistance member connected to the circuit, and the number of the inverters is an odd number. The application of the device can effectively reduce the impact of the clock signal on other surrounding signals and reduce the area of ​​the chip.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a clock signal generating device and electronic equipment. Background technique [0002] When the existing clock signal generating device generates the clock signal, it can only generate the clock signal with a fixed frequency. When signals of other frequencies need to be generated, the frequency of the clock signal can only be changed by increasing or decreasing the current source or capacitance inside the clock signal generating device, which increases the area of ​​the chip. Moreover, each adjustment operation can only change the frequency of the clock signal in a limited frequency domain, that is, the frequency of the generated clock signal is relatively concentrated, and will still cause interference to surrounding signals of other frequencies. Contents of the invention [0003] The problem solved by the embodiments of the present invention is how to reduce th...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03K5/156H03L7/18
Inventor 樊茂
Owner SPREADTRUM COMM (SHANGHAI) CO LTD