Title:
デジタルインターフェース上で信号を組み合わせる方法
Document Type and Number:
Japanese Patent JP4426112
Kind Code:
B2
Abstract:
A method for combining signals being conveyed across a digital interface is disclosed. In one embodiment, a subharmonic of a frequency is superimposed on asynchronous data. The subharmonic can be used to carry a frequency reference across the digital interface. In another embodiment, a time stamp algorithm is used to carry a time reference from a master circuit to a slave circuit across a digital interface. The transmission delay between the master circuit and slave circuit is measured. The master circuit transmits time correction messages to the slave circuit, based on the time the correction message is transmitted plus the transmission delay. In another embodiment, a reset signal is carried across a digital interface by discontinuing the transfer of a frequency reference for a predetermined time. A lowpass filter can be used at the receiving side of the interface to recognize the absence of the frequency reference and initiate a reset procedure at that side.
Inventors:
Lindqvist, Dan
Esterring, Jacob
Esterring, Jacob
Application Number:
JP2000586058A
Publication Date:
March 03, 2010
Filing Date:
November 19, 1999
Export Citation:
Assignee:
Telefon Akti Bora Get Elm Ericson (Pubble)
International Classes:
H04W88/08; H04W92/00; H03M5/12; H04L7/06; H04L25/49; H04W56/00
Domestic Patent References:
| JP8242193A |
Attorney, Agent or Firm:
Sonoda Yoshitaka
Kobayashi Yoshinori
Kobayashi Yoshinori