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Compensation method, device, resistance and rc oscillator for resistance process deviation

A technology of process deviation and compensation method, applied in the direction of electrical components, impedance network, etc., can solve the problems affecting the clock accuracy, affecting the performance of the application circuit, resistance deviation, etc., to achieve the effect of stable work

Active Publication Date: 2017-05-17
SHENZHEN RENERGY TECH
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  • Description
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Problems solved by technology

[0013] The purpose of the embodiments of the present invention is to provide a compensation method for resistance process deviation, aiming at solving the current resistance deviation caused by process dispersion in integrated circuits, which affects the performance of its application circuit, especially the problem of affecting clock accuracy

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  • Compensation method, device, resistance and rc oscillator for resistance process deviation
  • Compensation method, device, resistance and rc oscillator for resistance process deviation
  • Compensation method, device, resistance and rc oscillator for resistance process deviation

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Embodiment Construction

[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] In the embodiment of the present invention, the clock of one RC oscillator is used to count the clock of another RC oscillator, and the count value reflecting the relative process deviation information between resistors with opposite temperature coefficients is calculated by the calculation unit to calculate the resistance process Then, the resistance process deviation value is compensated for the resistance of the third RC oscillator, so that the resistance of the third RC oscillator can reliably and effectively become a zero temperature coefficient resistance, and the purpose of temperature...

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Abstract

The invention is suitable for the field of integrated circuits, and provides a method and a device for compensating for a resistance process deviation, zero-temperature-coefficient resistors and RC oscillators. The method comprises the following steps: generating a first RC oscillation signal and a second RC oscillation signal; generating a count value according to the first RC oscillation signal and the second RC oscillation signal, wherein the count value comprises resistance process deviation information; computing a resistance process deviation value according to the count value; and compensating for the resistors according to the resistance process deviation value in order that the resistors have zero temperature coefficients. A clock of one RC oscillator is used for counting a clock of another RC oscillator, the resistance process deviation value is computed through a computing unit by using the count value reflecting relative process deviation information between the resistors having reverse temperature coefficients, and a resistor of a third RC oscillator is compensated by using the resistance process deviation value, so that the resistor of the third RC oscillator is changed into the zero-temperature-coefficient resistor reliably and effectively, and the temperature compensating aim is fulfilled.

Description

technical field [0001] The invention belongs to the field of integrated circuits, and in particular relates to a compensation method and device for resistance process deviation, a resistance with zero temperature coefficient and an RC oscillator with temperature compensation characteristics. Background technique [0002] Digital circuits in digital-analog mixed-signal chips usually require a clock signal with precise frequency, and the clock signal is generated by an oscillator inside the chip. RC oscillator has simple structure, high integration and good performance, so it has been widely researched and applied. [0003] In a conventional RC oscillator, it operates by charging or discharging a capacitor through a resistor-controlled current system. When the voltage on the capacitor reaches the upper limit (or higher than a certain threshold), the switching device starts to discharge the capacitor; when the voltage on the capacitor reaches the lower limit (or is lower than ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H03H1/02
Inventor 许建超赵琮汤江逊欧阳振华许志玲
Owner SHENZHEN RENERGY TECH
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