Unlock instant, AI-driven research and patent intelligence for your innovation.

Current-mode programmable reference circuits and methods therefor

A current mode, reference circuit technology, applied in the direction of regulating electrical variables, instruments, control/regulation systems, etc., can solve problems such as lowering the operating voltage level, difficulty in using conventional bandgap reference circuits, and voltage margin limitations.

Inactive Publication Date: 2014-07-16
SEMICON COMPONENTS IND LLC
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, recent technological advances in the implementation of deep submicron CMOS circuits require reduced operating voltage levels
As a result, voltage headroom has become more and more limited, making it difficult to use conventional bandgap reference circuits

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Current-mode programmable reference circuits and methods therefor
  • Current-mode programmable reference circuits and methods therefor
  • Current-mode programmable reference circuits and methods therefor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0017] Embodiments of current mode reference circuits based on programmable floating gate transistors that can be configured to provide an output current that can be adjusted (tuned or trimmed) with high precision are disclosed below. In some embodiments, the current mode reference circuit includes two floating gate transistors. The current mode reference circuit also includes a differential amplifier configured to provide a difference in threshold voltages of the floating gate transistors across the reference resistor, producing a constant current. The difference in programmable thresholds reflected in the output reference current and reference voltage is proportional to the difference in charge present on the floating gate of each programmable transistor. The ability to modify the amount of such charge on the floating gate provides a convenient mechanism for adjusting the reference current and reference voltage. The reference circuit may include amplification stages and / or ...

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

No PUM Login to View More

Abstract

The present invention relates to a current mode programmable reference circuit and method thereof. A circuit includes a first current path including a first floating gate transistor having a programmable threshold voltage, a second current path, and a differential amplifier. The second current path includes a second floating gate transistor with a programmable threshold voltage and a resistor. The differential amplifier includes a first input coupled to the first current path, a second input coupled to the second current path, and an output configured to control the reference current path.

Description

technical field [0001] The present disclosure generally relates to current mode programmable reference circuits and methods thereof. Background technique [0002] Programmable reference circuits have been developed and used in a variety of electronic devices. Such circuits can provide a relatively stable reference voltage over a wide range of operating conditions. Amplifier circuits and other circuits have been developed to improve the accuracy of such reference voltages. [0003] The most common methods for implementing voltage and current references have been developed around the silicon bandgap. In such circuits, a reference current or voltage is derived from two p-n junctions operating at different current densities, each p-n junction having a different forward bias voltage drop. Conventional circuits typically utilize voltage-mode architectures that require significant voltage headroom for reliable operation. [0004] However, recent technological advances in deep s...

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
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G05F3/30
CPCG05F3/16G11C16/28G05F3/262G11C16/0408
Inventor R·H·雅各布A·佩特罗伊努
Owner SEMICON COMPONENTS IND LLC