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
Bend resistant cable
Semiconductor device having a multilevel interconnect structure and method for fabricating the same
Fuel cell system, and electric vehicle equipped with the fuel cell system
Safety device and method for electric heating appliances
Methods and devices for detecting and measuring environmental conditions in high performance device packages
Health monitoring of applications in a guest partition
Image erasing apparatus and recording medium conveying method for image erasing apparatus
  Randomly Featured Patents
Non-peptide GnRH agents, Pharmaceutical compositions, and methods for their use
Optical disc adhesive label applicator
Apparatus for making a reinforced fibrous absorbent member
Full-width film-supporting, driving, and stripping arrangement for motion picture film printing machines
Method and apparatus for securing a tail of film to a load
Method and system for diagnosing a computer system
Method of recovering bacteriophage
Tensioning rail for a chain drive with a bridging guide channel section as a pressing region
Stable hydrogen peroxide-releasing dentifice