Patent application number | Description | Published |
20110084769 | Estimation and Compensation of Oscillator Nonlinearities - A device comprises an oscillator circuit, a control circuit, a frequency detector circuit, and a processor circuit. The oscillator circuit comprises a frequency control input and is configured to output an oscillator signal. The frequency of the oscillator signal depends on an input signal applied to the frequency control input. The control circuit is configured to apply a first input signal value, a second input signal value, and a third input signal value to the frequency control input. The frequency detector circuit is configured to detect the first frequency value of the oscillator signal when the first input signal value is applied to the frequency control input, a second frequency value of the oscillator signal when the second input signal value is applied to the frequency control input, and a third frequency value of the oscillator signal when the third input signal value is applied to the frequency control input. The processor circuit is configured to calculate, on the basis of the first input signal value, the second input signal value, the third input signal value, the first frequency value, the second frequency value, and the third frequency value, a second order coefficient of a polynomial oscillator characteristic relating values of the frequency of the oscillator signal to values of the input signal. | 04-14-2011 |
20120303994 | APPARATUS FOR SYNCHRONIZING A DATA HANDOVER BETWEEN A FIRST CLOCK DOMAIN AND A SECOND CLOCK DOMAIN - Embodiments of the present invention provide an apparatus for synchronizing a data handover between a first clock domain and a second clock domain. The apparatus includes a calculator, a first-in-first-out storage, a synchronization pulse generator, a fill level information provider and a feedback path. The calculator is clocked with the clock of the first clock domain and configured to provide a synchronization pulse cycle duration information describing a temporal position of synchronization pulses at a clock of the second clock domain. The first-in-first-out storage is configured to take over an input data value in synchronization with the first clock domain and to provide an output data value in synchronization with the second clock domain and in response to a current synchronization pulse. The synchronization pulse generator is clocked with the clock of the second clock domain and configured to generate the subsequent synchronization pulse such that the subsequent synchronization pulse is located at the temporal position described by the synchronization pulse cycle duration information. The fill level information provider is configured to provide a fill level information describing a fill level of the first-in-first-out storage. The feedback path is configured for feeding back the fill level information to the calculator that is further configured to adjust the synchronization pulse cycle duration information based on the fill level information. | 11-29-2012 |
20120303996 | APPARATUS FOR SYNCHRONIZING A DATA HANDOVER BETWEEN A FIRST CLOCK DOMAIN AND A SECOND CLOCK DOMAIN - Embodiments of the present invention provide an apparatus for synchronizing a data handover between a first clock domain and a second clock domain. The apparatus includes a calculator, a synchronization pulse generator, a phase information provider and a feedback path. The calculator is clocked with a clock of the first clock domain and configured to provide synchronization pulse cycle duration information describing a temporal position of a synchronization pulse at a clock of the second clock domain. The synchronization pulse generator is clocked with the clock of the second clock domain and configured to generate the synchronization pulse such that the synchronization pulse is located at the temporal position described by the synchronization pulse cycle duration information. The phase information provider is clocked with the clock of the second clock domain and configured to provide a phase information describing a phase relation between the synchronization pulse and the clock of the first clock domain. The feedback path is configured for feeding back the phase information to the calculator. In addition, the calculator is configured to adjust the synchronization pulse cycle duration information based on the phase information. | 11-29-2012 |
20130223564 | DIGITAL WIDEBAND CLOSED LOOP PHASE MODULATOR WITH MODULATION GAIN CALIBRATION - One embodiment of the present invention relates to a modulation system having a phase locked loop and an adaptive control. The phased lock loop is configured to receive an input signal and an adaptive signal. The input signal is an unmodulated signal, such as a phase component or phase signal. The phase locked loop is also configured to provide an error signal and an output signal. The error signal indicates one or more modulation errors. The output signal is a modulated version of the input signal that has been corrected using the adaptive signal to mitigate the one or more modulation errors. | 08-29-2013 |