Method and apparatus for generating a modulated waveform signal
AssigneeFreescale Semiconductor, Inc.
InventorsMartin Mienkina, Pavel Grasblum
Life of this patent
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Abstract
A semiconductor device comprising timer logic for generating a first modulated waveform signal, and delay logic, operably coupled to the timer logic and arranged to provide a first delay in a rising edge of the first modulated waveform signal generated by the timer logic; and provide a second delay in a falling edge of the first modulated waveform generated by the timer logic. The first delay and second delay of the first modulated waveform forms a second, refined modulated waveform signal that comprises a higher frequency resolution than a frequency resolution of the first modulated waveform signal.
Claims20
A semiconductor device comprising:
- timer logic for generating a first modulated waveform signal;
- delay logic, operably coupled to the timer logic and arranged to provide a first delay in a rising edge of the first modulated waveform signal generated by the timer logic and provide a second delay in a falling edge of the first modulated waveform signal generated by the timer logic, such that the first delay and second delay of the first modulated waveform signal form a second, refined modulated waveform signal that comprises a higher frequency resolution than a frequency resolution of the first modulated waveform signal;
- wherein the delay in the rising edge of the first modulated waveform signal ‘td1[k]’ comprises a rising edge delay increment ‘dtL’, falling edge delay increment ‘dtH’ and a rising edge delay value calculated in the preceding waveform cycle ‘td1[k−1]’.
(canceled)
A method for generating a modulated waveform signal comprising:
- receiving a first modulated waveform signal;
- and
- generating a second, refined modulated waveform signal by causing a first delay in a rising edge of the first modulated waveform signal and causing a second delay in a falling edge of the first modulated waveform signal, such that the resulting second, refined modulated waveform signal comprises at least a higher frequency resolution than a frequency resolution of the first modulated waveform signal, wherein the delay in the rising edge of the first modulated waveform signal ‘td1[k]’ comprises a rising edge delay increment ‘dtL’, falling edge delay increment ‘dtH’ and a rising edge delay value calculated in the preceding waveform cycle ‘td1[k−1]’.
A computer-readable storage element having computer readable code stored thereon for programming a computer to perform a method for generating a modulated waveform signal, the code operable for:
- receiving a first modulated waveform signal;
- and
- generating a second, refined modulated waveform signal by causing a first delay in a rising edge of the first modulated waveform signal and causing a second delay in a falling edge of the first modulated waveform signal, such that the resulting second, refined modulated waveform signal comprises at least a higher frequency resolution than a frequency resolution of the first modulated waveform signal, wherein the delay in the rising edge of the first modulated waveform signal ‘td1[k]’ comprises a rising edge delay increment ‘dtL’, falling edge delay increment ‘dtH’ and a rising edge delay value calculated in the receding waveform cycle ‘td1[k−1]’.
Dependencies are inferred from the claim text.