Resources Contact Us Home
Clock recovery circuit of demodulator

Image Number 15 for United States Patent #5651031.

A clock recovery circuit capable of outputting decision point data without causing any slip of a recovered clock in the case of operation in a continuous mode in a demodulator in which received signals are sampled by a fixed frequency clock to obtain the recovered clock and symbol data are demodulated by using this recovered clock. A shift register stores digital received signals obtained by an A/D conversion of quasi-coherent detection received signals, and a clock phase estimator calculates an estimated phase difference between an output value of a phase generator operated by the fixed frequency clock and a symbol clock of the received signals and outputs timing information and phase information of a decision point for discriminating the data of the received signals. An interpolator inputs the output signal of the clock phase estimator, takes in the digital received signals from the shift register and calculates decision point data by interpolation to output the same. The interpolator operates at the same cycle as the symbol clock on an average.

  Recently Added Patents
Hybrid CMOS nanowire mesh device and PDSOI device
Method and apparatus for controlling peak amplifier and doherty power amplifier
Tunnel magnetoresistance read head with narrow shield-to-shield spacing
Polymer composites having highly dispersed carbon nanotubes
Accessing a base station
Magnetic recording medium, information storage device, and method of manufacturing magnetic recording medium
Data processing apparatus and data processing method for reducing an uneven color made up of two or more ink colors
  Randomly Featured Patents
Shoelace cover
Display device and display unit
Wall and molding protector for carpet installation
Method of DNA reassembly by interrupting synthesis
Method and apparatus for estimating a rotation speed of an electric motor
Configuration for detecting gaps in a conductor rail for electric rail vehicles being fed through conductor rails
Method, apparatus, and substance for treating tissue having neoplastic cells
Grill for an automobile
Method and system for generating data packets on a heterogeneous network
DNA polymerase III holoenzyme from Escherichia coli