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

System and method of galvanic isolation in digital signal transfer integrated circuits utilizing conductivity modulation of semiconductor substrate

a technology of conductivity modulation and integrated circuit, which is applied in the direction of semiconductor devices, semiconductor/solid-state device details, electrical apparatus, etc., can solve the problems of low power utilization, low efficiency, and high power requirement (10 ma)

Active Publication Date: 2013-03-14
NAT SEMICON CORP
View PDF7 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, it requires high power (10 mA).
If fast light emitting diodes (LEDs) are used, they are expensive and their response time degrades over time.
It also exhibits high common mode rejection, utilizes very low power, depends little on temperature and utilizes a small board footprint.
However, it is sensitive to external magnetic fields and requires clock encoded data.
However, it also exhibits low common mode transient immunity, higher noise, larger area than the other conventional options, and requires clock encoded data.
The system 400 exhibits poor flux coupling, low speed and poor manufacturability.
However, it requires giant magnetoresistor (GMR) technology and is sensitive to external magnetic fields.

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
  • System and method of galvanic isolation in digital signal transfer integrated circuits utilizing conductivity modulation of semiconductor substrate
  • System and method of galvanic isolation in digital signal transfer integrated circuits utilizing conductivity modulation of semiconductor substrate
  • System and method of galvanic isolation in digital signal transfer integrated circuits utilizing conductivity modulation of semiconductor substrate

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022]FIG. 6 shows a galvanic isolation system 600 that provides galvanic isolation in a digital transfer integrated circuit by using conductivity modulation of the semiconductor substrate. As discussed in greater detail below, modulation of the conductivity of the semiconductor (e.g., crystalline silicon) substrate affects the eddy current losses of a (differential) RF inductor that is isolated from the substrate by a sufficient amount of dielectric material, which provides a basis for signal transfer from the modulated substrate to the inductor across the isolation barrier.

[0023]As shown in FIG. 6, the galvanic isolation system 600 includes a transmitter circuit 602 that is implemented in a semiconductor substrate 604. A digital signal generated by the transmitter circuit 602 modulates conductivity by using, for example, a reverse biased diode 606 formed as part of the transmitter circuit 602. A receiver circuit 608 is implemented in a different die 610, which is integrated during...

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

A galvanic isolation system provides galvanic isolation in digital transfer integrated circuits by using conductivity modulation of the semiconductor substrate. Modulation of the conductivity of the substrate affects eddy current losses of a (differential) RF inductor that is isolated from the substrate by a sufficient amount of dielectric material, which provides a basis for signal transfer from the modulated substrate to the inductor across the isolation barrier.

Description

FIELD OF THE INVENTION[0001]The present invention relates to galvanic isolation of integrated circuits and, in particular, to a system and method of galvanic isolation that utilizes modulation of the conductivity of a semiconductor substrate, which affects eddy current loss generated in the substrate by an isolated RF inductor.BACKGROUND OF THE INVENTION[0002]Known methods of galvanic isolation used in on-chip or in-package digital signal processing (DSP) systems include optoelectronic-couplers, inductive coupling transformers, capacitive couplers, inductive coupling bond wire transformers, and inductive coupling magnetoresistor-based coupling devices.[0003]FIG. 1 shows a galvanic isolation system 100 that utilizes an optoelectronic coupler. The system 100 comprises proven technology that is widely used and provides low cost per basic unit. The system 100 provides high isolation capability and requires no data encoding. However, it requires high power (10 mA). If fast light emitting...

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 Applications(United States)
IPC IPC(8): H01L29/02H01L21/02H01L21/31
CPCH01L23/5227H01L2924/0002H01L2924/00
Inventor HOPPER, PETER J.SMEYS, PETERFRENCH, WILLIAMPAPOU, ANDREIADILTI, CHAUDHURI DUTT
Owner NAT SEMICON CORP