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Cloaking System Using Optoelectronically Controlled Camouflage
A Cloaking System designed to operate in the visible light spectrum, utilizes optoelectronics and/or photonic components to conceal an object within it.
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| Number | Title | Issue Date |
| 8159306 | Integrated circuit with low temperature coefficient and associated calibration method An integrated circuit (IC) with a low temperature coefficient and an associated calibration method are provided to lower the effect of the environmental temperature on the IC and at the same time to maintain the small area and low power consumption of the IC. The IC... | 04/17/2012 |
| 8143958 | Systems and methods for self testing a voltage controlled oscillator in an open loop configuration Methods and apparatus for self testing a multiband voltage controlled oscillator (VCO) are disclosed. A tuning voltage of the VCO is adjusted where the output of the VCO does not affect the input to the VCO. Frequency bands in the VCO are selected. Output frequencie... | 03/27/2012 |
| 8102215 | Compensated high-speed PLL circuit The invention relates to a compensation method and phase-locked loop (PLL) circuit, wherein different kinds of two-point modulations are used and the integral regulator of a loop filter is replaced by introducing predetermined settings at the loop filter or at a vol... | 01/24/2012 |
| 8049569 | Circuit and method for improving the accuracy of a crystal-less oscillator having dual-frequency modes A clock generation circuit is provided for improving the accuracy of a low power oscillator circuit contained therein. The clock generation circuit includes a crystal-less oscillator having at least two distinct frequency modes, including a low frequency mode and a ... | 11/01/2011 |
| 8044726 | Systems and methods for self testing a voltage controlled oscillator A method for self testing a multiband voltage controlled oscillator (VCO) is described. A first frequency band in a VCO is selected. An N value is selected for a frequency divider that produces a tuning voltage for the VCO that is between a low tuning voltage limit ... | 10/25/2011 |
| 7999625 | Method and apparatus for calibrating oscillators A method of calibrating oscillators is disclosed that includes searching, in an array storing an operational characteristic of the oscillator, for an index value that is associated with an output of the oscillator; determining that the output is within a predetermin... | 08/16/2011 |
| 7986193 | Noise reduction within an electronic device using automatic frequency modulation Disclosed is a system and method for providing an oscillating signal of relatively precise frequency without using a signal provided by a crystal as a reference. Disclosed is a feedback oscillator circuit configured to output an oscillating signal having a frequency... | 07/26/2011 |
| 7965144 | Phase locked loop circuit and integrated circuit for the same The present invention provides a phase locked loop circuit including: a voltage controlled oscillator; a variable frequency-dividing circuit; a phase comparing circuit for comparing a phase of the frequency-dividing signal a charge pump circuit; a loop filter; a vol... | 06/21/2011 |
| 7948326 | Method for carrying out a frequency change The invention relates to a method for carrying out a frequency change whilst retaining the phase relationship between several devices, in particular, network analyzers. Each device has at least one signal generator for stimulating an object for measurement and at le... | 05/24/2011 |
| 7944315 | Programmable voltage-controlled oscillator The invention discloses a programmable voltage-controlled oscillator. The programmable voltage-controlled oscillator has an output frequency. The programmable voltage-controlled oscillator includes a control unit, a current selector, a current mirror unit, an oscill... | 05/17/2011 |
| 7940131 | Apparatus, method and computer program product for tracking information in an electric grid An apparatus for rapidly tracking fundamental frequency information in the signal of an electric grid is a cross-coupled phase-lock loop filter (CCPLL) that includes the use of a phase-lock-loop (PLL) apparatus having a plurality individual filters, wherein an input... | 05/10/2011 |
| 7932785 | Phase lock loop with continuous calibration and method therefor A circuit includes a phase lock loop circuit and a continuous phase lock loop calibration circuit. The continuous phase lock loop calibration circuit is operatively coupled to the PLL circuit and produces a continuous calibration signal based on a reference voltage ... | 04/26/2011 |
| 7924100 | Crystal-less communications device and self-calibrated clock generation method A communication device uses a local clock generator to regenerate the carrier frequency of the reference signal from a remote communication. In particular, a closed loop is used to self-calibrate the local pulse till the frequency is fixed to be within a fixed frequ... | 04/12/2011 |
| 7924101 | Systems and methods for improved VCO gain tracking loop Methods and apparatus for calibrating the VCO element of a phase-locked loop to correct for non-linearities are disclosed. The modulation port of the VCO may be characterized to generate a tuning model, which may then be used to generate a correction signal to be co... | 04/12/2011 |
| 7907022 | Phase-locked loop and method for operating the same A phase-locked loop (PLL) system generates an oscillator signal based on an input reference signal. A calibration circuit generates a calibration current, and a voltage-to-current converter converts a control voltage into a first current. A current-controlled oscill... | 03/15/2011 |
| 7907020 | Constant calibration An oscillating signal of relatively precise frequency can be generated by tuning an oscillator using an external stable oscillating source as a reference. Calibration logic can be included to compare a signal from the local oscillator to the reference signal and var... | 03/15/2011 |
| 7907021 | Two-step VCO calibration method The present invention discloses a two-step VCO calibration method. The two-step VCO calibration method, comprising power-on calibration, used to provide a coarse VCO tuning; real-time calibration, used to provide a fine VCO tuning according to the loaded result of s... | 03/15/2011 |
| 7893776 | Monitoring and compensating for real time local circuit speed in an integrated circuit A speed monitor circuit integrated in an integrated circuit (IC) determines the speed of the IC. The speed monitor circuit includes an oscillator that generates an oscillator signal. A speed determining circuit generates a first count based on transitions of the osc... | 02/22/2011 |
| 7859346 | Clock generator and associated self-test and switching-control method A clock generator with extended tuning range and associated method is provided. The associated self-test and switching-control method includes steps of generating a primary clock signal by a phase-locked loop circuit; determining a frequency limit of the primary clo... | 12/28/2010 |
| 7821345 | Calibrating an oscillator and corresponding calibration device A method of calibrating an oscillator in order to compensate the dispersions generated, on the one hand, during the process of fabricating the oscillator circuit components and, on the other hand, by variations of operating conditions by modifying the parameters of ... | 10/26/2010 |
| 7804371 | Systems, modules, chips, circuits and methods with delay trim value updates on power-up Timing measurement is performed by a digital oscillator, using a calibration value which is calculated after chip fabrication is completed, and automatically loaded into selection logic at powerup. ... | 09/28/2010 |
| 7791418 | Systems and methods for compensating for variations of the output of a real-time clock Method and systems are provided for adjusting real-time clocks to compensate for frequency offset, temperature effects, and/or aging effects. ... | 09/07/2010 |
| 7764129 | Phase-lock loop startup circuit and voltage controlled oscillator reference generator A method of startup for a phase-locked loop (PLL) can include, at initiation of the PLL, providing a reference voltage from a startup voltage source to an input of a voltage controlled oscillator (VCO) in the PLL, wherein the reference voltage is set to a predetermi... | 07/27/2010 |
| 7764128 | Integrated circuit with non-crystal oscillator reference clock An integrated circuit with a non-crystal reference clock includes: an oscillator adapted to generate and transmit an oscillator output signal, wherein the oscillator includes at least one of an inductor, a resistor, and a capacitor; a comparator adapted to receive t... | 07/27/2010 |
| 7746181 | Circuit and method for extending the usable frequency range of a phase locked loop (PLL) An improved circuit and method is described herein for extending the usable frequency range of a high performance, narrow band phase locked loop (PLL) device. For example, the improved circuit and method may perform a calibration sequence for calibrating an LC-type ... | 06/29/2010 |
| 7746183 | Measurement apparatus for improving performance of standard cell library Disclosed herein is a measurement apparatus for improving performances of standard cells in a standard cell library when verifying performance of the standard cell library through a ring oscillator among various test element groups (TEGs). A built-in circuit is used... | 06/29/2010 |
| 7746182 | Systems and methods for voltage controlled oscillator calibration Various systems, methods and apparatus for calibrating a clock generating circuit are discussed herein. As one example, a method for calibrating a voltage controlled oscillator is disclosed. The method includes fixing the control voltage of a fine tune capacitor in ... | 06/29/2010 |
| 7737794 | Phase locked loop with temperature and process compensation Mechanisms are provided for compensating for process and temperature variations in a circuit. The mechanisms may select at least one resistor in a plurality of resistors in the circuit to provide a resistance value for generating a calibration voltage input to the c... | 06/15/2010 |
| 7728679 | Calibration of voltage controlled oscillators A calibration circuit (20, 50) and method (60) for calibrating the bias current of a VCO (10, 40) to minimize phase noise. The calibration circuit (20, 50) monitors the average voltage at the common-mode node of the VCO (10, 40) wh... | 06/01/2010 |
| 7714670 | Monitoring and compensating for real time local circuit speed in an integrated circuit An integrated circuit comprises an oscillator that generates an oscillator signal. A first counter generates a first count based on transitions of the oscillator signal. A first circuit generates a match signal based on the first count and a reference count. A secon... | 05/11/2010 |
| 7688150 | PLL with controllable bias level Embodiments disclosed herein may provide circuits having two or more different supplies to separately power analog and digital components in a circuit. In some embodiments, circuits such as PLLs may be provided with adjustable analog supplies. Other embodiments may ... | 03/30/2010 |
| 7688151 | Aging compensation method and control module for an oscillator circuit device An aging compensation method for an oscillator circuit device, in which the oscillator circuit device receives a control voltage from an application end, and outputs a clock signal with a predetermined frequency in response to the control voltage, includes the steps... | 03/30/2010 |
| 7679456 | Semiconductor integrated circuit and method of testing same A semiconductor integrated circuit includes S PLLs (S is an integer satisfying S≧2), and the (k−1)th PLL 12(k-1) (k is an integer satisfying 2≦k≦S) is connected to the kth PLL 12k in the test mode. In this manner, the exam... | 03/16/2010 |
| 7675370 | Dynamic calibration techniques for digitally controlled oscillator Techniques for calibrating digitally controlled oscillators (DCOs) are disclosed. In an aspect of the disclosure, an initial set of control codes for operating the DCO is determined. A range of output frequencies produced from the initial set is identified. Gaps or ... | 03/09/2010 |
| 7671688 | Reference-less clock circuit A programmable reference-less oscillator provides a wide range of programmable output frequencies. The programmable reference-less oscillator is implemented on an integrated circuit that includes a free running controllable oscillator circuit such as a voltage contr... | 03/02/2010 |
| 7642864 | Circuits and design structures for monitoring NBTI (negative bias temperature instability) effect and/or PBTI (positive bias temperature instability) effect A ring oscillator has an odd number of NOR-gates greater than or equal to three, each with first and second input terminals, a voltage supply terminal, and an output terminal. The first input terminals of all the NOR-gates are interconnected, and each of the NOR-gat... | 01/05/2010 |
| 7642863 | Systems and methods for PLL linearity measurement, PLL output duty cycle measurement and duty cycle correction Systems and methods for enabling the determination of voltage controlled oscillator (VCO) linearity, duty cycle determination and duty cycle correction in phase locked loop circuits (PLL's.) One embodiment comprises a method including the steps of determining the fr... | 01/05/2010 |
| 7633348 | Frequency-locking device and frequency-locking method thereof A frequency-locking device including a digitally-controlled oscillator (DCO) and a comparing unit is disclosed. The DCO is used for generating an output frequency signal. The comparing unit receives a Keep Alive signal from a universal serial bus (USB) and the outpu... | 12/15/2009 |
| 7609119 | Reference voltage generator for logic elements providing stable and predefined gate propagation time A reference voltage generator and a method for generating a reference voltage for a logic device using the reference voltage generator is provided. The voltage reference generator includes a ring oscillator having a plurality of logic gates and a phase/frequency det... | 10/27/2009 |
| 7560997 | Semiconductor integrated circuit device and test method therefor During testing frequency divider PS, test control voltage signal TC and RF test signal TS are supplied via balun Ti to input terminals IN1 and IN2. Test control voltage signal TC flows through resistors R1, R2 to turn on NPN transistor Q | 07/14/2009 |
