VOTER TESTER FOR REDUNDANT SYSTEMS
Granted: April 29, 2010
Application Number:
20100106448
A tester is configured to access and test each redundant channel of a voter. The tester is disposed between the voter and a multitude of redundant circuits supplying redundant channel signals to the voter. The tester includes a number of input ports receiving the redundant channel signals as well as the test signals. In response to a number of logic combinations of the test signals, the voter generates output signals each corresponding to one of the redundant channel signals. In response…
POWER SUPPLY CONTROLLER WITH DIFFERENT STEADY STATE AND TRANSIENT RESPONSE CHARACTERISTICS
Granted: April 8, 2010
Application Number:
20100085024
An embodiment of a power-supply controller includes a control circuit and a detection circuit. The control circuit has a signal characteristic, and is operable in response to a regulated output signal and a reference signal to cause at least one power-supply phase to generate the regulated output signal. The detection circuit is operable to detect a change in the regulated output signal, and to alter the signal characteristic of the control circuit in response to the detected change.
SYSTEM AND METHOD FOR PROVIDING LINEAR BUCK BOOST TRANSITIONS WITHIN A BUCK BOOST CONVERTER
Granted: April 8, 2010
Application Number:
20100085027
A voltage regulator, comprising first circuitry for generating an output voltage responsive to an input voltage and a plurality of switching control signal. Switching control circuitry generates the switching control signals responsive to the output voltage and at least one of a buck ramp signal and a boost ramp signal. Voltage ramp generation circuitry generates each of the buck ramp signal and the boost ramp signal. The boost ramp signal comprises the buck ramp signal offset by the…
SYSTEM AND METHOD FOR PROVIDING LINEAR BUCK BOOST TRANSITIONS WITHIN A BUCK BOOST CONVERTER
Granted: April 8, 2010
Application Number:
20100085028
A voltage regulator, comprises first circuitry for generating an output voltage responsive to an input voltage and a plurality of switching control signal. Switching control circuitry generates the switching control signals responsive to the output voltage and at least one of a buck ramp signal and a boost ramp signal. Voltage ramp generation circuitry generates each of the buck ramp signal and the boost ramp signal. The boost ramp signal comprises the buck ramp signal offset by the peak…
ADVANCED SLOPE INJECTION FOR INPUT CURRENT LIMITING OF SWITCH-MODE DC/DC CONVERTER
Granted: April 8, 2010
Application Number:
20100085029
A DC/DC converter comprising voltage conversion circuitry for generating a regulated output voltage responsive to an input current and at least one switching control signal. A current control loop generates the at least one switching control signal to limit an input current responsive to the input current, a reference voltage and a slope signal injected with the reference voltage.
PHASE DOUBLER
Granted: April 1, 2010
Application Number:
20100079175
A phase doubler driver circuit includes a first input for receiving a input PWM drive signal. First control logic generates a first output PWM drive signal and a second output PWM drive signal responsive to the input PWM drive signal. In a first mode of operation, alternating pulses of the input PWM drive are output as the first output PWM drive signal and the second PWM output drive signal respectively. In a second mode of operation, the input PWM drive signal is provided as the first…
VOLTAGE REGULATOR INCLUDING CONSTANT LOOP GAIN CONTROL
Granted: March 25, 2010
Application Number:
20100072964
A voltage regulation circuit includes a power stage for generating a regulated output voltage responsive to an input voltage and at least one PWM signal. A voltage divider circuit is connected to the output of the power stage and generates a feedback voltage. First circuitry generates the at least one PWM signal responsive to a voltage error signal, a filtered output voltage signal and a ramp voltage signal. The filtered output voltage is used for substantially removing loop gain change…
OUTPUT IMPEDANCE CONTROL CIRCUIT
Granted: March 25, 2010
Application Number:
20100073037
An external resistive element is used to provide a substantially constant output impedance for multiple drivers disposed on an IC. The drivers may operate at different supply voltages. Accordingly, the parameters which depend on the driver output impedance, such as rise/fall time, propagation delay, and the like are made substantially constant and independent of the semiconductor process variations, operating supply voltages, and the temperature. The substantially constant output…
CONFIGURABLE PHOTO DETECTOR CIRCUIT
Granted: March 25, 2010
Application Number:
20100074070
A configurable photo detector circuit comprises a photo detector array including a plurality of photo detectors coupled to a plurality of amplifiers. A method for programming a detection pattern of the configurable photo detector circuit comprises selecting a first detection pattern for the photo detector array, generating first signals to create the first selected detection pattern, and applying the first generated signals to the photo detector circuit to implement the first selected…
SYSTEM AND METHOD FOR PROVIDING PULSE FREQUENCY MODULATION MODE
Granted: March 18, 2010
Application Number:
20100066323
A voltage regulator comprises switching circuitry for generating a phase voltage at a phase node responsive to an input voltage and switching control signals. An inductor is connected to the phase node and an output voltage node. A capacitor is connected between the output voltage node and ground. An error amplifier generates an error voltage responsive to an output voltage from the output voltage node and a reference voltage. Switching control circuitry generates switching control…
DEVICE UNDER TEST POWER SUPPLY
Granted: March 18, 2010
Application Number:
20100066448
A power supply with and input and output includes an amplifier configured to set an output voltage of the power supply output equal to a fixed input voltage for the power supply. The power supply has a first output stage coupled to the amplifier and configured to source and sink current at the output of the power supply between a first voltage rail and a third voltage rail. The power supply has a second output stage coupled to the amplifier and configured to source and sink current to…
VOLTAGE REGULATOR INCLUDING QUASI TRANSITION DIODE EMULATION MODE OF OPERATION
Granted: March 18, 2010
Application Number:
20100066338
A voltage regulator includes an upper switching transistor connected between an input voltage node and a phase node. A lower switching transistor is connected between the phase node and ground. An output filter is connected between the phase node and an output voltage node. A PWM control circuit generates an PWM control signal responsive to a feedback voltage. An upper gate control circuit controls operation of the upper switching transistor responsive to the PWM control signal. A lower…
ADVANCED PHASE NUMBER CONTROL FOR MULTIPHASE CONVERTERS
Granted: March 18, 2010
Application Number:
20100066319
A control circuit for generating a control signal to add phases to a multiphase voltage regulator. The control circuit includes an input for receiving an error correction voltage from an error amplifier of the multiphase voltage regulator and at least one output for providing a PWM control signal. Control circuitry generates at least one PWM control signal to add a phase to the multiphase voltage regulator responsive to a determination that the error correction voltage has exceeded a…
SWITCHING REGULATOR INPUT CURRENT SENSING CIRCUIT, SYSTEM, AND METHOD
Granted: March 4, 2010
Application Number:
20100052611
A Buck switching regulator includes first Buck switching regulator circuitry is operable to generate a first output voltage from an input voltage and operable to generate a first sensed voltage having a value that is proportional to an output current being provided by the first Buck switching regulator circuitry. The first Buck switching regulator circuitry receives an input current and operates at a first duty cycle determined by a duty cycle signal. Input current sensing circuitry…
BATTERY CHARGER IC INCLUDING BUILT-IN USB DETECTION
Granted: March 4, 2010
Application Number:
20100052620
A charging circuit included on a single integrated circuit including first circuitry for generating a charging current responsive to an input voltage source. The input voltage source may comprise a USB voltage source or a non-USB voltage source. A USB detection circuit determines whether the input voltage source comprises the USB voltage source or the non-USB voltage source.
NOISE CANCELLATION FOR ANTENNA MODULE
Granted: February 25, 2010
Application Number:
20100048156
An antenna module with a detector and an associated canceller is disclosed. The detector may also detect interference and spurs. In one embodiment, an antenna module can include: an antenna configured to receive an electromagnetic signal in a signal path; an amplifier configured to amplify the received electromagnetic signal, and to provide the amplified signal at a first node; a filter configured to receive the amplified signal from the first node, and to provide a filtered signal…
RADIATION HARDENED DEVICE
Granted: February 18, 2010
Application Number:
20100038726
A “tabbed” MOS device provides radiation hardness while supporting reduced gate width requirements. The “tabbed” MOS device also utilizes a body tie ring, which reduces field threshold leakage. In one implementation the “tabbed” MOS device is designed such that a width of the tab is based on at least a channel length of the MOS device such that a radiation-induced parasitic conduction path between the source and drain region of the device has a resistance that is higher than…
BUCK BOOST FUNCTION BASED ON A CAPACITOR BOOTSTRAP INPUT BUCK CONVERTER
Granted: February 18, 2010
Application Number:
20100039085
A buck boost voltage converter circuit, comprises a capacitor pump circuit for boosting an input voltage in a first mode of operation when an input voltage is below a desired voltage level. A buck converter circuit provides the output voltage responsive to the boosted input voltage from the capacitor pump circuit in the first mode of operation and provides the output voltage responsive to the input voltage in a second mode of operation when the input voltage is above the desired voltage…
PWM CLOCK GENERATION SYSTEM AND METHOD TO IMPROVE TRANSIENT RESPONSE OF A VOLTAGE REGULATOR
Granted: February 11, 2010
Application Number:
20100033153
A pulse control clock generator for a voltage regulator including a comparator, a window circuit, a filter circuit, a ramp circuit, and a current circuit. The comparator compares a ramp voltage with a compensation voltage and provides a corresponding pulse control signal. The compensation voltage is indicative of output voltage error. The window circuit adds a window voltage to the compensation voltage to provide a hysteretic voltage. The filter circuit filters the hysteretic voltage to…
BUCK CONTROLLER HAVING INTEGRATED BOOST CONTROL AND DRIVER
Granted: February 4, 2010
Application Number:
20100026263
An integrated circuit controller for controlling the operation of a voltage converter which includes a first comparator for comparing a voltage associated with an input of a boost converter with a threshold voltage and generating a control signal in response thereto. A second comparator compares a second voltage associated with an output of the boost converter with the threshold voltage and generates a second control signal in response thereto. Driver circuitry generates a first…
