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
Stock analysis method, computer program product, and computer-readable recording medium
Registry key federation systems and methods
LCD driving circuit in which shift register units are driven by a first clock signal of fixed duty/amplitude and a second clock signal of variable duty/amplitude
Method and system for constructing a customized web analytics application
Systems and method for automatic color plane misregistration calibration
Method for identifying bacteria in a sample
Customizing a range of acceptable tape dimensional stability write conditions
  Randomly Featured Patents
Position sensing assembly with sychronizing capability
Methods, apparatus and products useful in the operation of a sucker rod pump during the production of hydrocarbons
Linear roller bearing
Method for treatment of menopausal and premenstrual symptoms
Scrubber vac-fan seal
Use of thermoplastic polymethylmethacrylate molding compositions
Regulating devices for a plurality of pumps driven by a common source
Modular plug connector
Gas pumping installation having means for regulating its pumping speed
Trough shade system and method