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Digital communication receiver interface circuit for wire pairs with duty cycle imbalance compensation

A technology for interface circuits and receiving signals, which is applied in the field of interface circuits and can solve problems such as complexity, cost and/or performance

Inactive Publication Date: 2018-05-15
SIGNIFY HLDG BV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, each of these communication interface circuits has certain disadvantages or limitations with respect to complexity, cost and / or performance

Method used

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  • Digital communication receiver interface circuit for wire pairs with duty cycle imbalance compensation
  • Digital communication receiver interface circuit for wire pairs with duty cycle imbalance compensation
  • Digital communication receiver interface circuit for wire pairs with duty cycle imbalance compensation

Examples

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Embodiment Construction

[0066] As discussed above, there is a general need for a communication interface circuit for a device that can ensure that the duty cycle of a signal received by the communication interface circuit and output to the rest of the device is maintained at a specified Range - Often a specific range around an ideal 50% duty cycle.

[0067] Accordingly, the present inventors have recognized and appreciated that it would be beneficial to provide a communication interface circuit that provides more flexible control of the duty cycle of received signals. The present inventors have also recognized and appreciated that it would be further beneficial to provide a communication interface circuit that also provides more flexible control of the rise and fall times of received signals.

[0068] In view of the foregoing, various embodiments and implementations of the present invention are directed to communication interface circuits and devices including communication interface circuits. In pa...

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PUM

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Abstract

A circuit (200) comprising: a diode bridge (210) having polarity-independent input terminals for coupling to a DALI bus and having positive and negative output terminals, wherein the diode bridge receives a receive signal from the DALI bus a galvanic isolation device (220) having an input for receiving said received signal from the diode bridge and an output for outputting a received signal galvanically isolated from the diode bridge and the DALI bus; a received signal threshold reference device (235) for setting a threshold voltage for the galvanically isolated device to respond to the received signal; an amplifier (280) for receiving the galvanically isolated received signal from the galvanically isolated device and outputting a binary digital signal via a low pass filter (290); and a first A duty cycle control device (230, 270) for adjusting the timing of the rising edge of the electrically isolated receive signal relative to its falling edge.

Description

technical field [0001] The present invention is directed generally to digital communication interfaces, and more particularly to interface circuitry for interfacing a device with a wire pair such as a Digital Addressable Lighting Interface (DALI). Background technique [0002] In recent years new or more stringent demands have been imposed on lighting systems, such as increased demands on energy conservation and the need to accommodate an increasing variety of different types of lighting units employing different Different types of light sources (for example, incandescent lamps, fluorescent lamps, light emitting diodes, etc.) are required to drive, where different types of lighting units are often deployed in the same building or even the same room. These needs drive the need for more options and flexibility in the control of lighting units within a facility. These needs in turn have led to the development and installation of lighting networks in many facilities. [0003] ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B37/02H04B3/50
CPCH04B3/50H05B47/18
Inventor S-C.雷泽雅努
Owner SIGNIFY HLDG BV