Patent application number | Description | Published |
20090085610 | GENERAL PURPOSE COMPARATOR WITH MULTIPLEXER INPUTS - A circuitry comprises a comparator for comparing a signal received on a first input to a signal received on a second input. A control register associated with the first multiplexer stores control values enabling connection of one input of the first multiplexer to the output of the first multiplexer. | 04-02-2009 |
20090085619 | POWER SUPPLY VOLTAGE MONITORS - The single chip microcontroller unit includes a processing unit having normal power mode of operation and a low power mode of operation. Analog circuitry and digital circuitry are connected to the processing unit. Monitoring circuitry determines if a chip supply voltage level exceeds a threshold level necessary to maintain operation of the digital circuitry. | 04-02-2009 |
20090085651 | SYSTEM FOR ADJUSTING OUTPUT VOLTAGE OF BAND GAP VOLTAGE GENERATOR - An apparatus comprises a band gap voltage generator circuit for generating a band gap voltage. A temperature invariant current generator is located within the band gap voltage generator circuit for generating a temperature invariant current. A temperature invariant current correction circuit is located within the band gap voltage generator circuit and adjusts the output voltage responsive to the temperature invariant current without altering temperature characteristics of the temperature invariant current. | 04-02-2009 |
20090085684 | LOW POWER RTC OSCILLATOR - The integrated circuit package includes a processing core for operating on a set of instructions to carry out predefined processes. An internal oscillator provides a system clock for the integrated circuit package. A programmable load capacitor array provides a programmable load to tune an oscillation frequency of the internal oscillator. An internal oscillator control register for controlling the operation of the programmable load capacitor array responsive to control bits of the programmable load capacitor array controlled by the processing core. | 04-02-2009 |
20090085685 | SYSTEM AND METHOD FOR CALIBRATING BIAS CURRENT FOR LOW POWER RTC OSCILLATOR - The integrated circuit package includes a processing core for operating on a set of instructions to carry out predefined processes. A real time clock circuit provides a system clock for the processing core. The real time clock further comprises an internal oscillator that generates the system clock for the integrated circuit package. The internal oscillator has a factory calibrated bias current. An internal oscillator control register controls the operation of the internal oscillator responsive to control bits of the programmable load capacitor array controlled by the processing core. | 04-02-2009 |
20090086517 | DC/DC BOOST CONVERTER WITH RESISTORLESS CURRENT SENSING - A DC to DC boost converter circuit receives a DC input voltage and converts it to a DC output voltage at a different voltage level than the DC input voltage. The DC to DC boost converter includes a switching power converter for receiving the input voltage on an input and converting the input voltage to an output as the DC output voltage in response to pulse control signals. A switching controller generates the pulse control signals during a switching cycle. Current sensing circuitry limits a current passing through the switching power converter. The current sensing circuitry generates an overload signal when the current exceeds a reference value. The current sensing circuitry sensing the current with a current sensing resistor having a size of at least approximately 500 ohms. | 04-02-2009 |
20090089599 | POWER SUPPLY SYSTEM FOR LOW POWER MCU - A microcontroller includes a processing unit having a processing unit having normal power mode of operation and a low power mode of operation. The processing unit further having digital circuitry connected to the processing unit having a plurality of logic circuits associated therewith for processing digital values. A plurality of retention flip-flops are associated with the digital circuitry for storing a logical state of at least one or more of the logic circuits within the digital circuitry when the processing unit enters the low power mode of operation. The plurality of retention flip flops include a first type of transistors for operating in both the low and high power modes of operation and a second type of transistors for operation only in the normal mode of operation and wherein substantially the remainder of the digital circuitry in the processing unit comprises the second type of transistors. | 04-02-2009 |
20090089605 | POWER SUPPLY VOLTAGE MONITORS - The single chip microcontroller unit includes a processing unit having normal power mode of operation and a low power mode of operation. Analog circuitry and digital circuitry are connected to the processing unit. A power management unit controls power operations of the processing unit, the analog circuitry and the digital circuitry. Power monitoring circuitry provides power control signals to the power management unit. The power monitoring circuitry further includes a system voltage monitoring circuit for generating a system voltage control signal responsive to a system voltage level with respect to a predetermined level. The power monitoring circuitry also includes a supply monitoring circuit for determining if a chip supply voltage level exceeds a threshold level. | 04-02-2009 |
20120161835 | CONTROLLING A FREQUENCY LOCKED LOOP - An apparatus includes a frequency locked loop and a controller. The controller stores a state of the frequency locked loop at which an output signal of the frequency locked loop is locked onto a reference signal and subsequently initializes the frequency locked loop with the stored state to cause the frequency locked loop to relock the output signal to the reference signal. | 06-28-2012 |
20120165960 | TECHNIQUE AND SYSTEM TO CONTROL A DRIVER STATE - A technique includes executing at least one instruction on a processor to control a driver circuit; and in response to a predetermined trigger condition, asynchronously causing the driver circuit to enter a predetermined state. | 06-28-2012 |
20120166859 | METHOD AND APPARATUS FOR GENERATING A SYSTEM CLOCK SIGNAL - An apparatus includes a processor, a clock recovery circuit and a frequency locked loop. The processor receives a system clock signal to clock operations of the processor; and the clock recovery circuit recovers a clock signal from data communication occurring over a bus. The frequency locked loop receives the clock signal from the clock recovery circuit as a reference clock signal, and the frequency locked loop is adapted to lock onto the clock signal provided by the clock recovery circuit to provide the system clock signal. | 06-28-2012 |
20120173787 | ANALOG INTERFACE FOR A MICROPROCESSOR-BASED DEVICE - An apparatus includes an integrated circuit, which includes a processor and a driver. The integrated circuit is fabricated by a process that establishes a nominal maximum voltage for components of the integrated circuit. The driver is adapted to selectively electrically couple a voltage that is higher than the nominal maximum voltage to an external terminal of the integrated circuit. | 07-05-2012 |
20130221940 | LINEAR REGULATOR - A technique includes using a pass device of a linear regulator to provide an output signal for the linear regulator in response to a signal that is received at a control terminal of the pass device. The control terminal is coupled to a node, and the node is associated with a bias current. The technique includes using a feedback path to communicate a feedback current with the node to regulate the output signal. The use of the feedback path includes regulating a magnitude of the feedback current to be within a range of magnitudes, which include a magnitude that exceeds a magnitude of the bias current. | 08-29-2013 |