Integrated circuit chip with built-in high precision frequency oscillator

Abstract

The present invention provides one kind of IC chip with built-in high-accuracy frequency vibrator. The IC chip with built-in frequency vibrator of the present invention includes: inner circuit for realizing the basic functions of the chip, and inside vibrator circuit connected to the inner circuit for providing inner clock source. The inside vibrator circuit includes: RC vibration circuit comprising resistors and capacitors to generate vibration signal, and frequency regulating circuit connected to the RC vibration circuit for regulating the frequency of vibration signal the RC vibration circuit generates.

Description

technical field [0001] The invention relates to an integrated circuit chip, in particular to a built-in frequency oscillator in the integrated circuit chip. Background technique [0002] With the development of electronic technology, the integrated circuit has become a very general electronic device. Often, an integrated circuit needs to be provided with a clock source due to internal circuit and function requirements. At present, the clock source in the integrated circuit is usually implemented by using an external oscillator with high precision (such as Crystal crystal oscillator, ceramic oscillator, etc.) to cooperate with the internal oscillator circuit of the integrated circuit chip, so that a higher Accuracy guaranteed by frequency. [0003] figure 1 A schematic structural diagram of a common integrated circuit externally connected to an oscillating element is shown. Such as figure 1 As shown, in addition to the internal circuit 11 of the chip IC1, a crystal oscil...

AI Technical Summary

Problems solved by technology

[0004] Although this traditional method provides a high-precision clock source for the chip, it faces two problems: First, the component cost will increase because an external oscillator is required; Second, the chip must provide pins for an external oscillator. bit

Due to the limitation of the number of chip pins, it is not conducive to the function expansion of other input / output (I / O) pins.

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