Abstract: A clock and data recovery circuit with jitter tolerance enhancement is provided. The CDR circuit includes: a bang-bang phase detector, a digital filter, a digitally controlled oscillator, and an adaptive loop gain control circuit. The CDR circuit detects a loop bandwidth variation and adjusts the loop bandwidth of CDR circuit by adjusting proportional path and integral path gain factors of the digital filter of the CDR circuit. The loop gain controller uses two methods to adjust the loop gain in CDR circuit: bang-bang adjusting method and linear adjusting method.

Abstract: A clock and data recovery circuit with jitter tolerance enhancement is provided. The CDR circuit includes: a bang-bang phase detector, a digital filter, a digitally controlled oscillator, and an adaptive loop gain control circuit. The CDR circuit detects a loop bandwidth variation and adjusts the loop bandwidth of CDR circuit by adjusting proportional path and integral path gain factors of the digital filter of the CDR circuit. The loop gain controller uses two methods to adjust the loop gain in CDR circuit: bang-bang adjusting method and linear adjusting method.

Abstract: A layer-jumping control device and method for an optical disc device includes a calculator, a controller, and a driver. The calculator is configured to receive an error-focusing signal, and to determine a peak and a trough of the error-focusing signal. The controller, coupled to the calculator, is configured to process the error-focusing signal to generate a control-focusing signal. The driver, coupled to the controller, is configured to convert the control-focusing signal to a control-driving signal. The device further includes a counter coupled to the calculator, and enables the layer jump when the counter reaches a predetermined value.

Abstract: New derivatives of tiacumicin B are disclosed and are presented by the general formula: wherein R is The use of these derivatives as a method for treating cancer or tumor is disclosed. A method of treating cancer or tumor by administrating the patient a composition comprising a therapeutically effective amount of the tiacumicin B is also disclosed.

Abstract: A layer-jumping control device and method for an optical disc device includes a calculator, a controller, and a driver. The calculator is configured to receive an error-focusing signal, and to determine a peak and a trough of the error-focusing signal. The controller, coupled to the calculator, is configured to process the error-focusing signal to generate a control-focusing signal. The driver, coupled to the controller, is configured to convert the control-focusing signal to a control-driving signal. The device further includes a counter coupled to the calculator, and enables the layer jump when the counter reaches a predetermined value.

Abstract: An optical disc drive generates a control signal according to the delay of a TZC signal. The control signal can determine if an optical pickup of the optical disc drive crosses a track. When the optical pickup is reading a defective section of an optical disk, the optical disc drive cannot correct the movement of the optical pickup. Therefore, after the optical pickup passes through the defective section of the optical disc, the optical disc drive adjusts the gain of the tracking drive signal according to the control signal.

Abstract: An isolated strain of the Moniliella species that converts glucose to erythritol with a conversion rate of at least about 45% is disclosed, as is a method of producing erythritol from such a strain.

Abstract: An isolated strain of the Moniliella species that converts glucose to erythritol with a conversion rate of at least about 45% is disclosed, as is a method of producing erythritol from such a strain.

Abstract: An isolated strain of the Moniliella species that converts glucose to erythritol with a conversion rate of at least about 45% is disclosed, as is a method of producing erythritol from such a strain.

Abstract: An isolated strain of the Moniliella species that converts glucose to erythritol with a conversion rate of at least about 45% is disclosed, as is a method of producing erythritol from such a strain.