KR970056005A - Call channel shift clock signal generator of personal communication terminal - Google Patents

Abstract

The present invention generates a shift clock signal for a call channel based on a 13 MHｚ reference clock generated by itself in transmitting control data for a call channel (PCH) from a base station to a terminal in a 102-multiframe manner. This invention relates to a call channel shift clock signal generator of a personal communication terminal, wherein each data bit has a length of 48 clocks based on a 13 MHｚ clock, and a personal time slot is formed of 156.25 bits. In the system, a reference clock of 13 MHz is generated to generate a bit synchronization signal based on the reference clock and the frame start signal, and then a time slot synchronization signal and a 148 bit signal are generated based on the bit synchronization signal. Then, the time slot synchronization signal is counted to calculate the current time slot number to output a strobe signal corresponding to the first time slot of each frame. A frame synchronous signal is generated based on the timeslot number, the frame synchronous signal is counted to calculate a frame number, and the frame number is calculated based on the frame number, the first time slot strobe signal of each frame, and the 148-bit signal. Generate a shift clock signal for the channel.

Description

Call channel shift clock signal generator of personal communication terminal

Since this is an open matter, no full text was included.

5 is a circuit diagram showing the configuration of a call channel shift clock signal generator of a personal communication terminal according to an embodiment of the present invention.

Claims (1)

A personal communication system configured to form a time slot with 156.25 bits and each data bit having a length of 48 clocks based on a clock of 13MHｚ, comprising: clock generating means for generating a reference clock of 13MHｚ and the reference; Bit synchronous signal generating means for generating a bit synchronous signal based on a clock and a frame start signal, time slot synchronous signal generating means for generating a time slot synchronous signal based on the bit synchronous signal and a reference clock, and the bit synchronous signal and a reference 148-bit signal generating means for generating a 148-bit signal based on a clock, time slot number counting means for counting the time slot synchronous signal, and outputting a current time slot number; time slot counted by the time slot number counting means A time slot strobe signal generating means for outputting a strobe signal corresponding to a first time slot based on a number; Frame synchronous signal generating means for outputting a frame synchronous signal based on the time slot number output from the number counting means, frame number counting means for counting the frame synchronous signal outputted from the frame synchronous signal generating means and outputting frame number data; A comparison means for comparing the frame number counted by the frame number counting means with its own reference data and outputting a high level signal if both data match, and a strobe signal for the call channel based on the output signal of the comparing means. And a call channel shift clock signal generating means for outputting a call channel strobe signal generating means and a shift channel signal generation signal for the call channel based on the call channel strobe signal and the first 148 bit signal of each frame. Call channel shift of personal communication terminal Lock signal generating unit. ※ Note: The disclosure is based on the initial application.