Patent application number | Description | Published |
20090121695 | METHODS AND APPARATUS FOR A MULTIPHASE POWER REGULATOR - Methods and apparatus for a multiphase power regulator according various aspects of the present invention operate in conjunction with an active transient response (ATR) system for applying a correction signal to a multiphase pulse width modulator. In the event of a transient, the ATR system may adjust the output of the pulse width modulator to quickly respond to load requirements. The output may be modified by adding pulses, blanking pulses, advancing pulses, and scaling pulses to one or more phases. | 05-14-2009 |
20100148795 | METHODS AND APPARATUS FOR SELECTING SETTINGS FOR CIRCUITS - Methods and apparatus selecting settings for circuits according to various aspects of the present invention may operate in conjunction with a measurement element connected to the circuit. The circuit may include a voltage source adapted to supply a voltage to the measurement element. The voltage may be substantially independent of the characteristics of the measurement element. The circuit may further include a measurement sensor responsive to a current in the measurement element. The measurement sensor may generate a control signal according to the current in the measurement element. | 06-17-2010 |
20100166132 | PLL/DLL DUAL LOOP DATA SYNCHRONIZATION - A dual loop (PLL/DLL) data synchronization system and method for plesiochronous systems is provided. A dual loop data serializer includes a phase lock loop (PLL) and a delayed lock loop (DLL) configured with a phase shifter in the feedback path of the PLL. The dual loop serializer locks to the input of the DLL instead of the local reference. Thus, the DLL adjusts the frequency from the PLL so that it matches the desired data rate. Each loop may be optimized for jitter tolerance with the net effect generating a synthesized clean clock (due to narrow bandwidth filtering) and VCO noise suppression (due to wide bandwidth filtering). A dual loop retimer includes a dual loop serializer (PLL/DLL) and a clock recovery DLL. The retimer resets the jitter budget to meet transmission requirements for an infinite number of repeater stages. | 07-01-2010 |
20110084678 | MULTI-THRESHOLD MULTI-GAIN ACTIVE TRANSIENT RESPONSE CIRCUIT AND METHOD FOR DIGITAL MULTIPHASE PULSE WIDTH MODULATED REGULATORS - Disclosed is a multi-phase pulse width, modulated voltage regulator and method in which transient voltage excursions or deviations that exceed the load line voltage by more than a pre-determined amount are detected by an ATR circuit and a correction signal is applied. The correction signal is in the form of asynchronous pulses and the number of such pulses is a function of the magnitude of the voltage excursion as determined by the number of thresholds that are exceeded. Also disclosed is an adaptive voltage positioning (AVP) circuit and method for early detection of a transient event by sensing voltage changes at the load and adjusting the target voltage with pre-determined current values prior to the time that ATR event changes in the current at the load are detected. | 04-14-2011 |
20120229104 | METHODS AND APPARATUS FOR VOLTAGE REGULATION WITH DYNAMIC TRANSIENT OPTIMIZATION - Methods and apparatus of dynamic transient optimization in a voltage regulator according to various aspects of the present invention may comprise a transition detector configured to compare an output voltage error to an amplitude threshold. The voltage regulator may further comprise a frequency detector configured to measure the frequency of the amplitude threshold being exceeded and to compare the frequency to a frequency threshold and a response circuit configured to activate a response according to a comparison between the frequency threshold and the frequency of the amplitude threshold being exceeded. | 09-13-2012 |
20140035651 | Sensor Circuit for Detecting the Setting of an Integrated Circuit - Methods and apparatus selecting settings for circuits according to various aspects of the present invention may operate in conjunction with a measurement element connected to the circuit. The circuit may include a voltage source adapted to supply a voltage to the measurement element. The voltage may be substantially independent of the characteristics of the measurement element. The circuit may further include a measurement sensor responsive to a current in the measurement element. The measurement sensor may generate a control signal according to the current in the measurement element. | 02-06-2014 |
20140043008 | METHODS AND APPARATUS FOR DYNAMIC VOLTAGE TRANSITION - Methods and apparatus for power regulation according to various aspects of the present invention may operate in conjunction with producing a voltage ramp starting at a first voltage and ending at a second voltage and compensating the voltage ramp according to a compensation parameter. The compensation parameter may be adapted to compensate for a circuit parameter. A voltage may then be generated according to the compensated voltage ramp. | 02-13-2014 |
Patent application number | Description | Published |
20090167271 | ACTIVE TRANSIENT RESPONSE CIRCUITS, SYSTEM AND METHOD FOR DIGITAL MULTIPHASE PULSE WIDTH MODULATED REGULATORS - Disclosed is a multi-phase pulse width modulated voltage regulator and method in which transient voltage excursions or deviations that exceed the load line voltage by more than a predetermined amount are detected by an ATR circuit and a correction signal is applied. The correction signal is in the form of asynchronous pulses and the number of such pulses is a function of the magnitude of the voltage excursion as determined by the number of thresholds that are exceeded. Also disclosed is an adaptive voltage positioning (AVP) circuit and method for early detection of a transient event by sensing voltage changes at the load and adjusting the target voltage with pre-determined current values prior to the time that ATR event changes in the current at the load are detected. The AVP load line is pre-positioned for more precise current control. Also disclosed is an adaptive filter with adjustable frequency characteristics in response to an ATR event. Also disclosed is a pulse limiting circuit. Also disclosed is a tri-state implementation. Response to transient events is further improved with an external ATR circuit coupled to the load. | 07-02-2009 |
20090261795 | MULTI-THRESHOLD MULTI-GAIN ACTIVE TRANSIENT RESPONSE CIRCUIT AND METHOD FOR DIGITAL MULTIPHASE PULSE WIDTH MODULATED REGULATORS - Disclosed is a multi-phase pulse width modulated voltage regulator and method in which transient voltage excursions or deviations that exceed the load line voltage by more than a pre-determined amount are detected by an ATR circuit and a correction signal is applied. The correction signal is in the form of asynchronous pulses and the number of such pulses is a function of the magnitude of the voltage excursion as determined by the number of thresholds that are exceeded. Also disclosed is an adaptive voltage positioning (AVP) circuit and method for early detection of a transient event by sensing voltage changes at the load and adjusting the target voltage with pre-determined current values prior to the time that ATR event changes in the current at the load are detected. | 10-22-2009 |
20110260537 | METHOD OF BALANCING CURRENT SUPPLIED TO A LOAD - A method of balancing current supplied by a plurality of regulators coupled to a load includes: measuring an average load current supplied by each regulator; determining an overall average current to be shared by the plurality of regulators; comparing each average load current with the overall average current to be shared by the plurality of regulators; and adjusting an output current of one or more of the plurality of regulators so that the plurality of regulators supply the same current to the load. | 10-27-2011 |
20120200274 | MULTIPHASE POWER REGULATOR WITH ACTIVE TRANSIENT RESPONSE CIRCUITRY - A multiphase power regulator includes a multiphase pulse width modulator, an output stage and an active transient response circuit. The output stage includes a high side transistor, a low side transistor and an inductor. The output stage is configured to supply power to a load responsive to signals generated by the multiphase pulse width modulator. The active transient response circuit is coupled between the output stage and the multiphase pulse width modulator and configured to detect the voltage level at the output stage and provide a signal to the multiphase pulse width modulator that is a function of the amplitude of the deviation of the detected voltage level from a target voltage. | 08-09-2012 |
20140055114 | System for Balancing Current Supplied to a Load - A system for balancing current supplied by a plurality of regulators coupled to a load includes circuitry operable to measure an average load current supplied by each regulator, determine an overall average current to be shared by the plurality of regulators, and compare each average load current with the overall average current to be shared by the plurality of regulators. The circuitry included in the system is also operable to adjust an output current of one or more of the plurality of regulators so that the plurality of regulators supply the same current to the load. | 02-27-2014 |
Patent application number | Description | Published |
20090216474 | Optical monitor for rugate filter deposition - This invention describes a means to monitor the deposition of a rugate filter such that the deposited filter will have the specified bandwidth, angular shift properties, and the correct wavelength of the reflectance peak. | 08-27-2009 |
20090324805 | Optical monitor for thin film deposition using base stack admittance - A method is provided for the determination of the time to terminate the deposition of an optical thin film using an exact model for the reflectance. This model is used to fit the reflectance measurements to determine the deposition rate, from which the time to deposit the entire layer is determined, as well as finding the admittance of the base stack at the beginning of the current layer. The layer deposition is terminated at the calculated time resulting in precise thickness control. This ability to fit the base admittance enables the determination of the reflection model parameters for each layer being deposited so that the accuracy of each layer is independent of previously deposited layers. This means that there is no build up of errors from layer to layer as the deposition progresses, enabling the deposition of coating designs with higher precision, including non periodic and non quarter wave designs. | 12-31-2009 |
20100040849 | Absorbing anti-reflection coatings for lenses - A method is provided for the reduction of image noise due to multiple reflections from lens surfaces which incorporates weak absorption into the antireflection coatings of the lens surfaces. Even though weak absorption in the coatings may slightly decrease the transmittance, these special coatings with tailored absorption will increase image contrast and signal to noise ratios. Such coatings may also be designed to reduce image noise from surface scattering as from dust or scratches on the front surface of a lens. Tailored absorption coatings may also be used to reduce back reflection from lens systems | 02-18-2010 |
20100182678 | Absorbing layers for the control of transmission, reflection, and absorption - An optical filter and a method for its design are provided that will transmit visible light and quickly cutoff to low transmission or high optical density in the near infrared wavelength region. This high optical density is achieved by either reflection or absorption of the incident light. Certain specified spectral wavelengths may be selected for absorption or reflection. These properties are achieved through the use of absorbing layers along with dielectric layers in the multilayer coating. | 07-22-2010 |
20100309555 | Narrow angle filter - An optical interference coating that transmits light in a narrow angular band has been achieved. This filter works in filtering light from different angles of arrival when it is operated in a tilted configuration to the incoming signal. Two such tilted filters whose normal vectors are rotated about an optical axis by 90 degrees enable light from all polarizations and from all angles of arrival to be effectively filtered by angle. | 12-09-2010 |
20110052793 | Optical monitor with computed compensation - A method is provided for the determination a thickness error in a previously deposited layer using the reflection monitor signal of the currently-depositing layer. This thickness error is then used to compute corrections to the thickness of the currently-depositing layer and the next layer which corrects for the thickness error in the previous layer. The method is stable with respect to noise in the optical monitor signal. The technique is applicable for optical coating designs which are not necessarily quarter wave. The approach avoids the buildup of thickness errors from layer to layer and thus is applicable for very thick designs with many layers. Near the end of a currently depositing layer the monitor signal is used to fit the admittance of the base stack under the current layer. This establishes the parameters in an exact reflectance model used for the rate or thickness monitoring of the current layer. | 03-03-2011 |
20110299813 | High speed optical interconnects - An optical interconnect that uses silver, gold, copper or other materials whose refractive index n is less than unity as the transmitting media has been conceived. This optical interconnect will transfer information over short distances faster than electrical conduction and faster than free-space optical transmission. The transfer speed is many times the free-space speed of light. | 12-08-2011 |