Abstract: A system and method for synchronizing otherwise independent oscillators private to I2C Bus slave devices. An I2C Bus master device can issue two new general call commands, CALIBRATE and ZERO COUNTERS. The I2C Bus slave devices respond to the CALIBRATE command by counting the number of cycles its local, private oscillator makes through during the communication transfer period of the CALIBRATE command on the I2C Bus. All such I2C Bus slave devices measure the same communication transfer period on the I2C Bus, so the differences in the digital measurements obtained by each of them are proportional to their respective oscillator frequencies. The digital measurements are privately used by each I2C Bus slave device to calculate appropriate oscillator prescale factors, and to automatically load the values that will harmonize the final product frequencies of all of the local oscillators on all of the I2C Bus slave devices in the system.

Abstract: An edge rate suppression circuit arrangement is provided for operation with an open drain bus. The circuit arrangement includes a variable resistive circuit having an input for receiving a variable voltage signal and an output coupled to the open drain bus, and a control circuit configured to operate the variable resistive circuit. The control circuit operates the variable resistive circuit in respective high and low resistance states in response to the variable voltage signal.

Abstract: An edge rate suppression circuit arrangement is provided for operation with an open drain bus. The circuit arrangement includes a variable resistive circuit having an input for receiving a variable voltage signal and an output coupled to the open drain bus, and a control circuit configured to operate the variable resistive circuit. The control circuit operates the variable resistive circuit in respective high and low resistance states in response to the variable voltage signal.

Abstract: A system and method for synchronizing otherwise independent oscillators private to I2C Bus slave devices. An I2C Bus master device is capable of issuing two new general call commands, MEASURE PULSE and RESET PRESCALE. The I2C Bus slave devices respond to the MEASURE PULSE command by returning a digital count related to the number of ticks its local, private oscillator cycles through during a signal pulse on the I2C Bus. All such I2C Bus slave devices measure the same signal pulse on the I2C Bus, so the differences in the digital measurements returned during the MEASURE PULSE command are proportional to their respective oscillator frequencies. The various digital measurements returned are used to calculate appropriate oscillator prescale factors that will harmonize the final product frequencies of all of the local oscillators on all of the I2C Bus slave devices in the system.

Abstract: A system and method for synchronizing otherwise independent oscillators private to I2C Bus slave devices. An I2C Bus master device can issue two new general call commands, CALIBRATE and ZERO COUNTERS. The I2C Bus slave devices respond to the CALIBRATE command by counting the number of cycles its local, private oscillator makes through during the communication transfer period of the CALIBRATE command on the I2C Bus. All such I2C Bus slave devices measure the same communication transfer period on the I2C Bus, so the differences in the digital measurements obtained by each of them are proportional to their respective oscillator frequencies. The digital measurements are privately used by each I2C Bus slave device to calculate appropriate oscillator prescale factors, and to automatically load the values that will harmonize the final product frequencies of all of the local oscillators on all of the I2C Bus slave devices in the system.

Abstract: A system and method for synchronizing otherwise independent oscillators private to I2C Bus slave devices. An I2C Bus master device is capable of issuing two new general call commands, MEASURE PULSE and RESET PRESCALE. The I2C Bus slave devices respond to the MEASURE PULSE command by returning a digital count related to the number of ticks its local, private oscillator cycles through during a signal pulse on the I2C Bus. All such I2C Bus slave devices measure the same signal pulse on the I2C Bus, so the differences in the digital measurements returned during the MEASURE PULSE command are proportional to their respective oscillator frequencies. The various digital measurements returned are used to calculate appropriate oscillator prescale factors that will harmonize the final product frequencies of all of the local oscillators on all of the I2C Bus slave devices in the system.

Abstract: In a power converter for supplying a controlled output from an input supply, a plurality of transfer devices is used to selectively couple the input supply to a distribution of storage devices. In a high-current mode, each of the transfer devices and associated storage device is used to couple the input supply to the controlled output. In a minimal-current mode, each of the transfer devices and associated storage device is selectively disabled until only one transfer device and storage device is utilized, and this remaining device may also be selectively disabled. Because the storage devices are distributed, each storage device can be smaller than that required for the high-current operation, thereby minimizing the losses associated with high-current switching converters during low-current operation. In another aspect of this invention, the plurality of transfer devices is operated at different phases to one another, thereby reducing the ripple associated with high-current operation.

Abstract: An output driver circuit for coupling a logic circuit to load includes an input node, an output node for coupling to the load and a pull down switch which discharges the output node in response to a signal received at the input node. A current sink circuit includes a feeder transistor which provides current to the control terminal of the pull down switch to render the pull down switch conductive when the voltage at the output node exceeds a first threshold value between a logic high and a logic low. The feeder transistor is charged by a first charging path having a first impedance by which it takes a first time period to render the pull down switch conductive, the first impedance providing a low standby current when the voltage at the output node is below about the first value.