Title:
DEVICE FOR FACILITATING COMMUNICATION BETWEEN ANALOG DEVICE AND DIGITAL DEVICE
Document Type and Number:
Japanese Patent JPH04247751
Kind Code:
A
Abstract:
PURPOSE: To simplify communication between an analog device and a digital device. CONSTITUTION: This device includes a transmission attenuator 30 for operating attenuation when an outputted signal passes the transmitting circuit, and an analog/digital converting circuit 20. A receiving circuit 14 includes a reception attenautor 52 for operating attenuation when an inputted signal passes the receiving circuit, and a digital/analog converting circuit 42. The digital adjustment of the transmission attenautor and the reception attenuator can be attained by a controlling circuit 16. The control circuit senses and compares the outputted signal and the inputted signal, and decides whether the transmission or the reception is operated by this device. When the transmission is operated, the signal attenuation in the receiving circuit is increased, and the signal attenuation in the transmitting circuit is decreased. When the reception is operated, the signal attenuation in the transmitting circuit is increased, and the signal attenuation in the receiving circuit is decreased.
Inventors:
HAABAATO EMU CHIEN
ARAN EFU HENDORIKUSON
ARAN EFU HENDORIKUSON
Application Number:
JP24743791A
Publication Date:
September 03, 1992
Filing Date:
September 26, 1991
Export Citation:
Assignee:
ADVANCED MICRO DEVICES INC
International Classes:
H04M1/253; H04M1/60; H04M1/00; H04M9/08; (IPC1-7): H04M1/00; H04M1/60
Attorney, Agent or Firm:
Hisami Fukami (4 outside)