Title:
【発明の名称】モノリシツクアナログインターフエース回路
Document Type and Number:
Japanese Patent JP2650667
Kind Code:
B2
Abstract:
1. A monolithic analog interface circuit (CIA) between a signal processor (PSI) and a telecommunication network (LT), where the signal processor comprises access means for a bus line and operates by means of digital signals and the telecommunication network transmits signals of the analog type, said interface circuit includes circuits for conversion (5, 19) and filtering (8, 11, 14) and also for performing electronic functions such as automatic gain control (16), signal attenuation (9), signal detection (18) and generation of clock frequencies (23, 24, 25, 26, 27) characterized in that it includes addressed send and echo signal registers (2) connected to the bus line and constituted by write registers (2a, 2b) associated each to a buffer register (2c, 2d), the buffer registers coming after the write registers and authorising the writing of bits of the information signals into the write registers without phase constraints, the bits of the information signals subsequently being reconstituted and converted after being multiplexed, in that the circuit also includes addressed receive and residual signal registers (3) connected to the bus line and constituted by a write register (3e) containing the information concerning the signal detection and write registers (3a, 3b) associated to buffer registers (3c, 3d), the buffer registers coming before the write registers and authorising two subsequent conversions controlled by an asynchronous control logis (20), and in that it further includes command registers (4) connected to the bus line and addressed and decoded for containing command words operating on the various circuits in order to program them by authorising, inter alia, the selection of the clocks, the choice of the configuration of the filtering circuits, the attenuation of the signals and the automatic gain control.
Inventors:
RYUKU MARII
KURISUTOFU RUNE JON DORANJU
KURISUTOFU RUNE JON DORANJU
Application Number:
JP19690385A
Publication Date:
September 03, 1997
Filing Date:
September 07, 1985
Export Citation:
Assignee:
TEREKOMYUNIKASHION RAJIOEREKUTORITSUKU E TEREFUONIKU TRT
International Classes:
H04L25/03; G06F3/05; H04L7/04; H04L27/00; H04L29/10; (IPC1-7): H04L25/03; G06F3/05; H04L29/10
Domestic Patent References:
| JP56154857A | ||||
| JP5812460A | ||||
| JP49107104A | ||||
| JP5936464A | ||||
| JP5550765A | ||||
| JP56131245A | ||||
| JP5788241U | ||||
| JP5854117U |
Attorney, Agent or Firm:
Akihide Sugimura (1 outside)