摘要:
Embodiments include circuit devices and methods for re-clocking an input signal. In an embodiment, a circuit device includes a data storage element having a data input to receive a digital data stream having a first clock rate and including a clock input to receive a clock signal having a second clock rate. The data storage element further includes logic to adjust edge timing of transitions within the digital data stream based on the clock signal to produce a modulated output signal having a power spectrum with spectral nulls at a desired frequency and its harmonics without changing an average data rate.
摘要:
A tuner circuit includes a digital signal processor to generate a digital data stream related to a radio frequency signal and a transceiver circuit coupled to the digital signal processor and configurable to generate an inter-chip communication frame having a start portion and a plurality of channels. The plurality of channels includes a first data channel to carry a portion of the digital data stream and a control channel to carry control data. The transceiver circuit is configurable to send the inter-chip communication frame to an additional tuner circuit through an inter-chip communication link.
摘要:
Embodiments include circuit devices and methods for re-clocking an input signal. In an embodiment, a circuit device includes a data storage element having a data input to receive a digital data stream having a first clock rate and including a clock input to receive a clock signal having a second clock rate. The data storage element further includes logic to adjust edge timing of transitions within the digital data stream based on the clock signal to produce a modulated output signal having a power spectrum with spectral nulls at a desired frequency and its harmonics without changing an average data rate.
摘要:
A tuner circuit includes circuitry to produce a first DSP frame based on a first RF signal and includes an inter-chip receiver circuit coupled to an inter-chip link and configured to receive an inter-chip frame. The inter-chip receiver circuit is configured to detect a start of frame symbol of the inter-chip frame and to extract a DSP offset and data related to a second DSP frame from the inter-chip frame. The tuner circuit further includes a digital signal processor coupled to the circuitry and to the inter-chip receiver circuit. The digital signal processor synchronizes the first DSP frame with the second DSP frame based on the start of frame symbol and the digital signal processor offset. The digital signal processor performs a selected antenna diversity operation on the first and second DSP frames to produce an output signal.
摘要:
In an embodiment, a tuner circuit includes an inter-chip receiver circuit configurable to couple to a first inter-chip communication link to receive a first data stream and includes an analog-to-digital converter configured to convert a radio frequency signal into a digital version of the radio frequency signal. The tuner circuit further includes a digital signal processor coupled to the inter-chip receiver circuit and the analog-to-digital converter. The digital signal processor is configurable to generate an output signal related to at least one of the first data stream and the digital version of the radio frequency signal based on a selected operating mode.
摘要:
In an embodiment, a tuner circuit includes circuitry to produce a first DSP frame based on a first RF signal and includes an inter-chip receiver circuit coupled to an inter-chip link and configured to receive an inter-chip frame. The inter-chip receiver circuit is configured to detect a start of frame symbol of the inter-chip frame and to extract a DSP offset and data related to a second DSP frame from the inter-chip frame. The tuner circuit further includes a digital signal processor coupled to the circuitry and to the inter-chip receiver circuit. The digital signal processor is to synchronize the first DSP frame with the second DSP frame based on the start of frame symbol and the digital signal processor offset, the digital signal processor configured to perform a selected antenna diversity operation on the first and second DSP frames to produce an output signal.
摘要:
In an embodiment, a tuner circuit includes an inter-chip receiver circuit configurable to couple to a first inter-chip communication link to receive a first data stream and includes an analog-to-digital converter configured to convert a radio frequency signal into a digital version of the radio frequency signal. The tuner circuit further includes a digital signal processor coupled to the inter-chip receiver circuit and the analog-to-digital converter. The digital signal processor is configurable to generate an output signal related to at least one of the first data stream and the digital version of the radio frequency signal based on a selected operating mode.
摘要:
A tuner circuit includes a digital signal processor to generate a digital data stream related to a radio frequency signal and a transceiver circuit coupled to the digital signal processor and configurable to generate an inter-chip communication frame including a start portion and a plurality of channels. The plurality of channels includes a first data channel to carry a high definition intermediate frequency signal and including a second data channel to carry a demodulated audio signal, the transceiver circuit configurable to provide the inter-chip communication frame to an inter-chip communication link.
摘要:
A line card for interfacing with a plurality of subscriber lines includes a plurality of data processors and a tone detector. Each of the data processors is associated with one of the subscriber lines. The tone detector is adapted to detect one of a plurality of activation tones on a selected subscriber line. The plurality of activation tones include a first activation tone having an active portion and a silent portion. The active and silent portions repeat periodically at a first frequency having a first period. A second activation tone has a phase reversal portion repeating at a second frequency and having a second period. The tone detector is further adapted to sequence between the subscriber lines at a predetermined interval. The predetermined interval is based on the first and second periods. The tone detector is adapted to signal the data processor associated with the selected subscriber line in response to detecting one of the activation tones.