A non-resistor high-precision low-power reference source
A high-precision, low-power technology, applied in the direction of adjusting electrical variables, instruments, control/regulation systems, etc., can solve the problems of inability to meet the requirements of high precision and high power supply rejection ratio, so as to reduce design cost and improve power supply rejection ratio , Improve the effect of temperature characteristics
Active Publication Date: 2019-01-01
天津应大科讯电气设备有限公司
View PDF6 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0004] The purpose of the present invention is to solve the restrictive relationship between the power consumption and performance of the existing reference source, especially the low power consumption cannot meet the requirements of high precision and high power supply rejection ratio
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0030] The present invention will be further elaborated below in conjunction with the accompanying drawings and specific embodiments.
[0031] The circuit diagram of the non-resistive high-precision reference source proposed by the present invention is as follows figure 2 As shown, it includes a start-up circuit, a bias current generation circuit, a reference voltage generation circuit, a high-order compensation circuit and a low-pass filter circuit. The start-up circuit in this embodiment includes a first NMOS transistor MN1, a first PMOS transistor MP1 and a second PMOS transistor MP2, the gate of the second PMOS transistor MP2 is connected to the gate of the first NMOS transistor MN1 and the drain of the first PMOS transistor MP1, and its drain is used as the output end of the startup circuit; the first PMOS transistor MP1 and the first PMOS transistor MP1 The source of the second PMOS transistor MP2 is connected to the power supply voltage VDD, the drain and source of the...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention provides a no-resistor-type high-precision low-power-consumption reference source, and belongs to the technical field of power management. A starting circuit enables a reference circuit to work normally during the circuit initialization phase, and reference current generated by a bias current generating circuit is used as the bias current of a reference voltage generating circuit, and meanwhile used as the bias current of a high order compensation circuit; the generated bias current can achieve high order compensation and meet self-bias demands; in the reference voltage generating circuit, the negative temperature coefficient voltage generating part uses the bias current as the collector current of a BJT, and compared with the traditional VBE, an obtained negative temperature coefficient voltage VCTAT greatly reduces the negative temperature characteristics of the VBE; a positive temperature coefficient voltage VPTAT and the negative temperature coefficient voltage VCTAT are superposed to obtain the reference voltage. In addition, the high order compensation circuit is introduced to obtain the reference voltage with better temperature characteristics, and the output part is added with a low-pass filter circuit to improve the power supply rejection ratio PSRR of the reference circuit. The reference source can achieve nanowatt-level power dissipation, and no resistance is arranged, which reduces the chip area.
Description
technical field [0001] The invention belongs to the technical field of power management, and in particular relates to the design of a non-resistive high-precision and low-power reference source circuit. Background technique [0002] As the core module of the electronic system, the reference source is in many circuits such as analog-to-digital converter (ADC), digital-to-analog converter (DAC), linear regulator, switching regulator, temperature sensor, rechargeable battery protection chip and communication circuit. An indispensable part, providing an accurate and stable reference signal source for the circuit. [0003] As electronic systems, especially battery-powered or self-powered systems, such as environmental sensor networks, energy harvesting systems, bioelectronic systems, etc., have increasingly urgent requirements for low voltage and low power consumption, it is necessary to reduce the power consumption of the reference source and maintain the stability of the refere...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): G05F1/567
CPCG05F1/567
Inventor 石跃曹建文孙庆吉周泽坤凌味未
Owner 天津应大科讯电气设备有限公司