Seiko Instruments Inc

Fujitsu Corporation

Yoshiaki Saka

Isamu Fujii

Yuji Hishiki

Shinichi Idomukai

Toshiharu Ohshima

A low noise and lower power consumption receiver including a CRC error correction circuit which is constructed at low cost, prolongs a life of a battery and enhances a receiving sensitivity. The receiver comprises a data processing unit which continuously determines errors in received data encoded by a CRC code and corrects them by comparing with reference syndrome patterns, a microprocessor circuit including a data RAM connected with local data buses and local address buses and a serial data receiving apparatus including state control means, a synchronizing circuit, an ID comparing circuit and a circuit for gating system clock. The high performance and low power consumption receiver may be realized with less additional circuits, having more flexibility to the increase of services.

Receiver for communication

In a selected paging signal type receiving apparatus, a transmission code is received which is arranged by coupling a series of signal codes including a preamble, a sync code, and a message code. Even when signal reception is interrupted, this receiving apparatus can immediately respond to an interference condition and a completion of a signal transmission. In the case of the interference condition, the receiving apparatus can be immediately recovered to the signal reception operation after the interference condition disappears. This selected paging signal type receiving apparatus with a simple arrangement is arranged by a sync signal generator for generating a signal having the same time period as that of the sync code, and reset when the preamble is detected; a receiving circuit intermittently operated in response to the sync signal from a sync signal generator; a sync code detecting circuit and a preamble detecting circuit intermittently operated in response to this sync code; and also a paging code detecting circuit operated only when the sync code is detected.

Method and apparatus for receiving selected paging signal

A microinstruction memory stores microinstructions, and a microinstruction execution unit executes a selected one of the microinstructions by a pipeline process and outputs an operation result. The microinstructions include a specific microinstruction. The data processing apparatus also includes a correction part which has the microinstruction execution unit execute the specific microinstruction when a predetermined event occurs so that the parameter is changed to a corrected parameter which corresponds to a parameter used in an immediately previous pipeline process. The microinstruction execution unit stops operating when the predetermined event occurs and starts the operation again by using the corrected parameter.

Growing community of inventors

Chiba, Japan

Yoshiaki Saka