CN-122026902-A - Configurable high-precision voltage-controlled oscillator for sensing signal system

CN122026902ACN 122026902 ACN122026902 ACN 122026902ACN-122026902-A

Abstract

The embodiment of the application provides a configurable high-precision voltage-controlled oscillator for a sensing signal system. The integrated circuit comprises a first regulating circuit and a second regulating circuit, wherein the first regulating circuit and the second regulating circuit respectively comprise a pulse generating unit, an amplifier unit, a pulse shaping unit, a superposition unit and a feedback unit, the pulse generating unit is used for generating corresponding pulse signals according to an external control code, the amplifier unit is used for generating threshold voltages according to the feedback voltage and the external control code and inputting the generated threshold voltages into the pulse shaping unit, the pulse shaping unit is used for shaping the pulse signals generated by the pulse generating unit according to the input threshold voltages and outputting adjustment pulse signals, and the superposition unit is used for superposing the adjustment pulse signals output by the pulse shaping unit and a periodic clock and outputting the adjusted periodic clock signals. The voltage controlled oscillator improves the accuracy of the output clock signal.

Inventors

ZHOU LIANG
HUANG WENGANG
LIAO WANG
PENG CHAO
TAO ZHIYING
XIE XIANGYANG
LIU YANTONG

Assignees

中国电子科技集团公司第二十四研究所

Dates

Publication Date: 20260512
Application Date: 20260128

Claims (7)

1. A configurable high-precision voltage-controlled oscillator for a sensing signal system is characterized by comprising a first regulating circuit and a second regulating circuit, wherein the first regulating circuit and the second regulating circuit respectively comprise a pulse generating unit, an amplifier unit, a pulse shaping unit, a superposition unit and a feedback unit; the pulse generating unit is used for generating a corresponding pulse signal according to an external control code; The amplifier unit is used for generating threshold voltage according to the feedback voltage and an external control code and inputting the generated threshold voltage into the pulse shaping unit; The pulse shaping unit is used for shaping the pulse signal generated by the pulse generating unit according to the input threshold voltage and outputting an adjusting pulse signal; the superposition unit is used for performing superposition operation on the pulse shaping unit output adjustment pulse signal and the periodic clock and outputting an adjusted periodic clock signal.
2. The method of claim 1, wherein the pulse generating unit comprises a first external control terminal, a second external control terminal, first to third capacitors, a first resistor, first to seventh charge and discharge switches, wherein the first external control terminal is connected to a fourth charge and discharge switch, the fourth charge and discharge switch is connected to one end of the second capacitor, the second external control terminal is connected to a fifth charge and discharge switch, and the fifth charge and discharge switch is connected to one end of the third capacitor.
3. The method of claim 1, wherein the pulse shaping unit comprises a comparator having a first input for receiving the pulse signal generated by the pulse generating unit and a second input for receiving the amplifier unit for generating the threshold voltage, and wherein the output of the comparator is coupled to the superimposing unit.
4. The method of claim 1, wherein the amplifier unit comprises a third external control terminal, a feedback voltage input terminal, a supply voltage input terminal, and a threshold voltage output terminal.
5. The method of claim 1, wherein the superposition unit comprises a logic and gate, wherein an output of the logic and gate of the first regulating circuit is connected to a first input of the logic and gate of the second regulating circuit, and wherein an output of the logic and gate of the second regulating circuit is connected to a first input of the logic and gate of the first regulating circuit.
6. The method according to claim 1, wherein the feedback unit comprises a first inverter and a second inverter connected in series, an output of the second inverter being connected to the pulse generating unit.
7. The method of claim 1, wherein the amplifier unit further comprises a first MOS tube, a sixteenth MOS tube, wherein the source of the first MOS tube and the source of the second MOS tube are connected with a power supply voltage, the gate and the drain of the first MOS tube are connected, the drain of the first MOS tube is connected with the drain of the third MOS tube, the gate and the drain of the second MOS tube are connected, the drain of the second MOS tube is connected with the drain of the fourth MOS tube, the gate of the third MOS tube is connected with a reference voltage, the gate of the fourth MOS tube is connected with an input signal, the source of the third MOS tube, the source of the fourth MOS tube is connected with the drain of the fifth MOS tube, the source of the fifth MOS tube is grounded, the gate of the fifth MOS tube is connected with a first bias signal, the source of the sixth MOS tube is connected with a second bias signal, the drain of the sixth MOS tube is connected with the source of the seventh MOS tube, the gate of the seventh MOS tube is connected with a reference voltage, the gate of the eighth MOS tube is connected with the gate of the eighth MOS tube, the gate of the seventh MOS tube is connected with the input signal, the gate of the seventh MOS tube is connected with the drain of the ninth MOS tube, the drain of the ninth MOS tube is connected with the drain of the ninth MOS tube, the tenth MOS tube is connected with the drain of the ninth MOS tube, the drain of the eighth MOS tube is connected with the drain of the eighth MOS tube; the grid electrode of the thirteenth MOS tube is connected with the third bias signal, the grid electrode of the fourteenth MOS tube is connected with the fourth bias signal, the source electrode of the eleventh MOS tube is connected with the power supply voltage, the grid electrode of the eleventh MOS tube is connected with the drain electrode of the second MOS tube, the drain electrode of the eleventh MOS tube is connected with the drain electrode of the fifteenth MOS tube, the source electrode of the twelfth MOS tube is connected with the power supply voltage, the grid electrode of the twelfth MOS tube is connected with the drain electrode of the first MOS tube, the drain electrode of the twelfth MOS tube is connected with the drain electrode of the thirteenth MOS tube, the source electrode of the thirteenth MOS tube is connected with the source electrode of the fourteenth MOS tube, the drain electrode of the fourteenth MOS tube is connected with the drain electrode of the sixteenth MOS tube, the grid electrode of the fifteenth MOS tube is connected with the drain electrode of the tenth MOS tube, the source electrode of the fifteenth MOS tube is grounded, the grid electrode of the sixteenth MOS tube is connected with the drain electrode of the ninth MOS tube, and the source electrode of the sixteenth MOS tube is grounded.

Description

Configurable high-precision voltage-controlled oscillator for sensing signal system Technical Field The application relates to the field of integrated circuit design, in particular to a configurable high-precision voltage-controlled oscillator for a sensing signal system. Background In communication and control systems, a clock signal is usually required, and the existing clock signal generation method mainly comprises a phase-locked clock circuit and a voltage-controlled oscillator circuit. The pll clock circuit cannot generate a clock signal, but needs to multiply and divide an external reference clock to obtain a desired frequency. Phase locked loop clock circuits therefore require the system to provide a clock source and the quality of their output clock signal is largely affected by the quality of the input reference clock. The voltage-controlled oscillator circuit is a clock circuit that changes the frequency of an output signal by controlling a voltage, and is composed of a crystal oscillator, a resistance-capacitance oscillator, an LC oscillator, and the like. The voltage-controlled oscillator does not need an external clock source, but the output clock precision of the existing voltage-controlled oscillator is limited, and the requirements of the sensing signal field on high-precision acquisition, amplification, operation and processing of tiny signals are difficult to meet. Disclosure of Invention The application provides a configurable high-precision voltage-controlled oscillator for a sensing signal system, which is used for solving the problem of insufficient precision of an output clock signal of the conventional voltage-controlled oscillator. The configurable high-precision voltage-controlled oscillator for the sensing signal system comprises a first regulating circuit and a second regulating circuit, wherein the first regulating circuit and the second regulating circuit respectively comprise a pulse generating unit, an amplifier unit, a pulse shaping unit, a superposition unit and a feedback unit; the pulse generating unit is used for generating a corresponding pulse signal according to an external control code; The amplifier unit is used for generating threshold voltage according to the feedback voltage and an external control code and inputting the generated threshold voltage into the pulse shaping unit; The pulse shaping unit is used for shaping the pulse signal generated by the configurable pulse generating unit according to the input threshold voltage and outputting an adjusting pulse signal; the superposition unit is used for performing superposition operation on the pulse shaping unit output adjustment pulse signal and the periodic clock and outputting an adjusted periodic clock signal. Optionally, the pulse generating unit comprises a first external control end, a second external control end, first capacitors, third capacitors, a first resistor, first charge and discharge switches and seventh charge and discharge switches, wherein the first external control end is connected with a fourth charge and discharge switch, the fourth charge and discharge switch is connected with one end of the second capacitor, the second external control end is connected with a fifth charge and discharge switch, and the fifth charge and discharge switch is connected with one end of the third capacitor. Optionally, the pulse shaping unit comprises a comparator, a first input end of the comparator is used for receiving the pulse signal generated by the pulse generating unit, a second input end of the comparator is used for receiving the amplifier unit and is used for generating the threshold voltage, and an output end of the comparator is connected with the superposition unit. Optionally, the amplifier unit includes third to eighth external control terminals, a feedback voltage input terminal, a power supply voltage input terminal, and a threshold voltage output terminal. Optionally, the superposition unit includes a logic and gate, an output end of the logic and gate of the first adjusting circuit is connected with a first input end of the logic and gate of the second adjusting circuit, and an output end of the logic and gate of the second adjusting circuit is connected with a first input end of the logic and gate of the first adjusting circuit. Optionally, the feedback unit includes a first inverter and a second inverter, the first inverter and the second inverter are connected in series, and an output end of the second inverter is connected with the pulse generating unit. Optionally, the amplifier unit further includes: a first MOS tube-a sixteenth MOS tube, wherein the source electrode of the first MOS tube and the source electrode of the second MOS tube are connected with a power supply voltage, the grid electrode of the first MOS tube is connected with the drain electrode of the first MOS tube, the drain electrode of the first MOS tube is connected with the drain electrode of the third MOS tube, the gr