Fast start ptat current source based on op amp positive feedback mechanism
A fast-start, positive feedback technology, applied in the direction of adjusting electrical variables, control/regulating systems, instruments, etc., can solve the problems of slow response speed and high power consumption of PTAT current source, shorten the settling time, reduce power consumption, and improve reliability. The effect of stick performance
Active Publication Date: 2020-11-17
西安绘芯微半导体科技有限公司
View PDF12 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 provide a fast-start PTAT current source based on the positive feedback mechanism of the operational amplifier, which solves the problems of slow response speed and high power consumption of the existing PTAT current source
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 described in detail below in conjunction with the accompanying drawings and specific embodiments.
[0031] The structure of the quick-start PTAT current source circuit based on the operational amplifier positive feedback mechanism of the present invention is as follows: figure 1 As shown, the circuit proposes to use a voltage clamping operational amplifier and an operational amplifier module with a positive feedback mechanism to fix the voltage and reduce the error between the base-emitter voltage; the current source includes a positive temperature coefficient voltage generation unit, a voltage clamping operational amplifier , operational amplifier unit with positive feedback mechanism, positive feedback functional module, and current mirror load unit; the proposed PTAT current source generation circuit does not need to use special technology, and can achieve high performance guarantee under traditional CMOS technology;
[0032] Positive fe...
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 discloses a quick start PTAT current source based on an operational amplifier positive feedback mechanism. The quick start PTAT current source comprises a positive temperature coefficient voltage generating unit, a voltage clamp operational amplifier, an operational amplifier unit in a positive feedback mechanism as well as a forward feedback functional module and a current mirror load unit; the provided PTAT current source generation circuit does not need to adopt a special process, and a high performance guarantee can be realized under the traditional CMOS process condition; and the forward feedback functional module comprises a triggered-type module and an IFast current source, and the triggered-type module and the IFast current source are connected and used for performingquick start of the circuit. The current source disclosed by the invention reduces power consumption while performance is guaranteed, and quick start of the circuit is realized.
Description
technical field [0001] The invention belongs to the technical field of positive temperature current on an analog integrated circuit chip, and in particular relates to a quick-start PTAT current source based on a positive feedback mechanism of an operational amplifier. Background technique [0002] Existing on-chip PTAT current sources are often generated using a bandgap reference. As the current supply module of the whole system on chip, the current source affects the function of the whole chip. The existing PTAT current source mostly adopts a bandgap reference structure, which uses the voltage drop generated by the voltage difference of two diodes on the on-chip resistor to generate the same Current proportional to temperature, designed to solve problems of circuit reliability, high cost, etc. Existing PTAT current sources focus on the design of circuit stability, and a lot of research work has been done. However, the stability, response speed and power consumption of PTAT...
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 井凯郭仲杰杨媛余宁梅
Owner 西安绘芯微半导体科技有限公司