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Multi-channel configurable testable and trimmed digital signal isolator

A digital signal and isolator technology, applied in the direction of logic circuit interface device, logic circuit connection/interface layout, etc., can solve the problem that it is difficult to change the circuit, so as to increase the application range, save the cost and cycle of test and adjustment, and facilitate use Effect

Active Publication Date: 2022-01-14
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the verification test and adjustment of the chip occupy more than 70% of the time in the whole development process of the chip; There are still many deviations, and after the chip is packaged, it is difficult to change the internal circuit for trimming

Method used

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  • Multi-channel configurable testable and trimmed digital signal isolator
  • Multi-channel configurable testable and trimmed digital signal isolator
  • Multi-channel configurable testable and trimmed digital signal isolator

Examples

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Embodiment Construction

[0040] The technical solutions of the present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0041] like figure 1 As shown, the multi-channel configurable tape-adjustable digital isolator is mainly transmitted by a multi-channel core circuit 19, transmitting a reception configuration module 18, a test repair module 16, an output driving circuit 17, a four-channel Signals I / O PAD11 to 14, the output drive enable PAD10, and the internal four-bit MODE PAD 15 is packaged. The signal can be input or output by four channel signals I / O PAD11 to 14, and the three-channel signals I / O PAD11 to 13 can be reused in the test repair mode to be SPI input, digital isolator passage core circuit 19 The transmitting end or receiving circuit can be configured, and the transmission reception configuration module 18 is configured to configure a different transmission reception mode by the package internal plurality Mode PAD 15, ...

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PUM

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Abstract

The invention discloses a multi-channel configurable testable and trimmable digital signal isolator, and the isolator comprises a multi-channel two-way transmission core circuit, a sending and receiving configuration module, a testing and trimming module and an output drive enabling module, wherein the sending and receiving configuration module comprises a multi-bit PAD and MODE control circuit in a package; the output drive enabling module comprises an output drive enabling circuit, an output drive enabling PAD and a path I / O PAD, and the test trimming module comprises a test trimming mode selection circuit, an SPI interface circuit and a test sampling selection circuit. The digital signal isolator does not need to additionally add any PAD, is convenient for a user to use, can enter a test trimming mode at any time, can greatly increase the application range of a chip, and saves the test trimming cost and period of the chip.

Description

Technical field [0001] The present invention belongs to the technical field of integrated circuit design, and more particularly to a multi-channel configurable tonable and modulated digital signal isolator. Background technique [0002] The isolator is mainly used to process the transmission of low voltage signals between different voltage domains, often used in motor control, isolation ADC, isolation drive, and the like. Depending on the isolation medium, the digital signal isolator can be divided into optocoupler isolators, magnetic coupling isolators, and capacitive isolators; with SIO 2 The capacitance type isolator for isolation media uses a standard CMOS process with high transmission rate, low delay, long life, and high withstand voltage. [0003] The digital signal isolator typically includes a transmitting end, that is, a modulation module, a receiving end, a demodulation module, an isolation capacitance module, and the transmitting signal modulates a signal that can pas...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K19/0175
CPCH03K19/017509
Inventor 曾京波奚剑雄何乐年
Owner ZHEJIANG UNIV
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