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Oscillator and clock generating circuit

A technology of oscillators and oscillating signals, applied in the direction of electrical components, automatic power control, etc., can solve problems such as low frequency of oscillating signals, deviation of clock frequency and duty cycle, difficulty in meeting high-speed requirements, etc., and achieve high speed and quality Effect

Pending Publication Date: 2022-05-13
CHANGXIN MEMORY TECH INC
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Problems solved by technology

However, the frequency of the oscillation signal generated by the current ring oscillator is low, which is difficult to meet the high-speed requirements; in addition, the frequency and duty cycle of the oscillation signal generated by the current ring oscillator are easily affected by the process, power supply voltage, temperature, clock load, etc. influence, which makes the clock frequency and duty cycle deviate

Method used

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  • Oscillator and clock generating circuit
  • Oscillator and clock generating circuit
  • Oscillator and clock generating circuit

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Embodiment Construction

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. However, those skilled in the art can understand that in each embodiment of the present invention, many technical details are provided for readers to better understand the present application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized.

[0045] figure 1 A schematic diagram of a circuit structure of an oscillator provided by an embodiment of the present invention.

[0046] refer to figure 1 , the oscillator includes: a first ring topology, which is connected end to end by a plurality of first inverters 11, and propagates an oscillating signal at a first transmission speed; a second ring ...

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Abstract

The embodiment of the invention provides an oscillator and a clock generation circuit, and the oscillator comprises a first ring topological structure which is formed by connecting a plurality of first phase inverters end to end and transmits an oscillation signal at a first transmission speed; the second ring topological structure is formed by connecting a plurality of second phase inverters end to end and propagates the oscillation signal at a second transmission speed; wherein the first ring topological structure is electrically connected with the second ring topological structure, and the second transmission speed is smaller than the first transmission speed. The embodiment of the invention is beneficial to improving the speed and quality of the oscillation signal.

Description

technical field [0001] Embodiments of the present invention relate to the field of semiconductors, in particular to an oscillator and a clock generating circuit. Background technique [0002] Dynamic Random Access Memory (Dynamic Random Access Memory, DRAM) is a semiconductor storage device commonly used in computers, and is composed of many repeated storage units. In the DRAM I / O circuit, a high-speed clock signal of a specific frequency is required for reading and writing and clock calibration. [0003] A high-speed clock signal can be generated inside the DRAM through a ring oscillator (ring oscillator) to meet the above requirements. However, the frequency of the oscillation signal generated by the current ring oscillator is low, which is difficult to meet the high-speed requirements; in addition, the frequency and duty cycle of the oscillation signal generated by the current ring oscillator are easily affected by the process, power supply voltage, temperature, clock lo...

Claims

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Application Information

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IPC IPC(8): H03L7/099
CPCH03L7/099H03K3/0315H03K3/017H03K3/011H03K3/3545H03L5/00H03L1/02
Inventor 汪玉霞田凯
Owner CHANGXIN MEMORY TECH INC
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