摘要:
A control system comprises a DC/DC converter that includes first and second inductances, that receives a first DC voltage and that generates a second DC voltage. A control module selectively charges or discharges the first inductance while discharging or charging the second inductance during a first mode and one of charges both of the first and second inductances or discharges both of the first and second inductances during a second mode.
摘要:
An input/output data rate synchronization system includes a first data buffer that receives input data at a first rate, that temporarily stores the input data, and that outputs the input data at a second rate. A data processing module receives the input data from the first data buffer and outputs processed data at a third rate. A second data buffer receives the processed data from the data processing module at the third rate, temporarily stores the processed data, and outputs the processed data at a fourth rate. The data processing module temporarily stops receiving the input data and generating the processed data when the second data buffer exceeds a first predetermined capacity. The data processing module increases the second rate when the first data buffer exceeds a second predetermined capacity and decreases the second rate when a difference between the second and first rates is greater than a predetermined rate.
摘要:
A closed-loop control system for a DC/DC converter includes a DC/DC converter that receives a first DC voltage and that generates a second DC voltage. The DC/DC converter includes first and second inductances. A control module receives the second DC voltage and generates at least one control signal to one of charge or discharge the first and second inductances. The control module has first and second modes. During the first mode the control module alternately charges one of the first and second inductances and discharges the other of the first and second inductances. During the second mode the control module one of charges or discharges both of the first and second inductances. The control module initiates the second mode when a transient condition occurs in the DC/DC converter. The transient condition is based on one of the second DC voltage and current through an output capacitance in the DC/DC converter.
摘要:
A wireless receiver comprises a band-pass filter module that includes an input for receiving a first pilot signal, an output that generates a first signal based on the first pilot signal, and a control input for adjusting a center frequency of the band-pass filter module. A control module determines the energy of the first signal, generates a control signal based on the energy, and communicates the control signal to the control input of the band-pass filter module.
摘要:
An adaptive analog echo/near-end crosstalk (NEXT) cancellation system includes a bit slicer that receives a first analog receive signal and that generates a first error control signal. A digital signal processor (DSP) receives a digital receive signal and a digital transmit signal and generates second and third error control signals. A first summing module generates a fourth error control signal by summing the second and third error control signals. A selector outputs the first error control signal during a first mode and the fourth error control signal during a second mode. An echo/NEXT cancellation module communicates with the selector and generates an estimated echo/NEXT signal based on the first error control signal and an analog transmit signal during the first mode and based on the fourth error control signal and the analog transmit signal during the second mode.
摘要:
A network device including a physical layer (PHY) device and an autonegotiation module. The PHY device is configured to interface with N cable pairs, where N is greater than 1. The PHY device includes a cable test module configured to diagnose a short circuit in one of the N cable pairs. The autonegotiation module is configured to i) selectively perform autonegotiation to establish a link with a link partner at one of a first link speed and a second link speed that is lower than the first link speed, and ii) select between the first link speed and the second link speed in response to the cable test module diagnosing the short circuit.
摘要:
Apparatus and methods relating to channel equalization include a method including: generating a first output signal in a frequency domain based on a communications signal of a channel; determining a first channel response based on the first output signal and one or more pilot signals of the communications signal; generating a first equalized signal based on the first output signal and the first determined channel response; generating a first decision signal based on the first equalized signal; generating an output signal in a time domain based on the first decision signal; determining a second channel response based on the time domain output signal; generating a second output signal in the frequency domain based on the second channel response; generating a second equalized signal based on the first and second output signals and the time domain output signal; and generating a second decision signal based on the second equalized signal.
摘要:
A regulated power supply includes an inverter comprising an upper switch and a lower switch that are connected in series. A control module selectively controls the upper switch and the lower switch in one of a pulse width modulation (PWM) mode and a discrete control mode (DCM), receives a feedback signal from an output of the regulated power supply, and switches between the PWM mode and the DCM based on the feedback signal.
摘要:
A duty cycle estimator comprises an error generator that compares an output of a switching regulator to a reference to generate an output error, wherein the switching regulator operates in accordance with a switching period. An accumulator determines an accumulated error of the output error over a time period of at least N times the switching period of the switching regulator, where N is an integer. An adjustment determiner adjusts a duty cycle for the switching regulator based on the accumulated error of the output error over the time period.
摘要:
A controller comprises a duty cycle estimator to determine a nominal duty cycle. An adjustment determiner determines an adjustment value to combine with the nominal duty cycle to generate an adjusted duty cycle. A pulse width adjuster varies a pulse width signal based on the adjusted duty cycle. Transfer of energy between an input and a regulated output is based on the pulse width signal.