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...During the Civil War, the Confederacy established its own Patent Office which issued 266 patents, a third of which concerned implements of war.
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| Number | Title | Issue Date |
| 8093955 | Applying charge pump to realize frequency jitter for switched mode power controller Method and apparatus for adding jitter to an oscillator for reducing EMI are disclosed An oscillator circuit includes an oscillator configured to generate a first clock having a first frequency and a frequency jitter circuit including a charge pump configured to cha... | 01/10/2012 |
| 8085102 | Low-power relaxation oscillator The low-power relaxation oscillator comprises a first module (21) having a ramp generator formed by a reference current source (31) and a storage capacitor (32) defining a ramp voltage (Vramp1), and a voltage comparator (m1, m | 12/27/2011 |
| 8076981 | Self-calibrating oscillator An oscillator that increases the accuracy of an output frequency, without using a charge pump, has an oscillation circuit, first and second voltage supply circuits, and a calibration value generation circuit. The first voltage supply circuit includes a resistor and ... | 12/13/2011 |
| 8067992 | Temperature compensation circuit and method Disclosed are various embodiments of temperature-compensated relaxation oscillator circuits that may be fabricated using conventional CMOS manufacturing techniques. The relaxation oscillator circuits described herein exhibit superior low temperature coefficient perf... | 11/29/2011 |
| 8063710 | Self-calibrating oscillator A self-calibrating oscillator that increases the output frequency accuracy without using a charge pump includes an oscillation circuit, a pulse counter, a charging circuit, a reset circuit, a calibration circuit, and a timing control unit. The pulse counter counts a... | 11/22/2011 |
| 8058937 | Setting a discharge rate and a charge rate of a relaxation oscillator circuit An apparatus and method for setting a ratio of a discharge rate to a charge rate for measuring a capacitance on a sensor element of a sensing device. The apparatus may include a sensor element of a sensing device, a relaxation oscillator having a first and a second ... | 11/15/2011 |
| 8054141 | Method and circuit for cancelling out comparator-delay in the relaxation oscillator A relaxation oscillator includes a capacitor connected to a comparator input, current sources switched to supply power to the capacitor based on an output of the comparator, and a duplicate integrator shifting a voltage on the capacitor to offset a propagation delay... | 11/08/2011 |
| 7965149 | Resistor-capacitor oscillator An embodiment for low power-consumption RC oscillator is disclosed. A voltage transforming unit transforms a power supply voltage to an internal voltage. A current mirroring unit is coupled to the voltage transforming unit and receives the internal voltage to provid... | 06/21/2011 |
| 7948328 | Oscillator generating normal clock signal Disclosed is an oscillator including a reference voltage generator generating a reference voltage, and a logic combination circuit generating complementary first and second internal clock signals in response to the reference voltage and complementary first and secon... | 05/24/2011 |
| 7940136 | Oscillator An oscillator is provided. The oscillator comprises a flip-flop module, a first and a second setting module. The first setting module comprises: a first switch device to generates a first switch signal according to a first oscillating signal, an NMOS and an inverter... | 05/10/2011 |
| 7940135 | Oscillation circuit This oscillation circuit includes a triangular wave generation circuit that generates a triangular wave signal corresponding to an outputted clock signal, a comparison circuit that generates a clock signal corresponding to a comparison of the triangular wave signal ... | 05/10/2011 |
| 7898349 | Triangular wave generating circuit, and charging and discharging control circuit A charging and discharging circuit of a triangular wave oscillation circuit includes an inverter circuit; a discharging reference potential generating circuit; a first NMOS transistor having a drain connected with a connection point between a first current source ci... | 03/01/2011 |
| 7889016 | Integrated RC oscillator with high frequency stability, notably for an integrated switched-mode power supply An integrated oscillator (10), for an integrated circuit, comprises i) first (CI1) and second (CI2) compensated inverters mounted in series and each comprising first (PI11;PI21) and second (PI12;PI22) plain inverters ... | 02/15/2011 |
| 7863992 | Oscillator having comparator circuits having adjustable driving capabilities and method for operating the same An oscillator includes a first comparator circuit, a second comparator circuit, an oscillation signal generator circuit, and a frequency voltage generator circuit. The first comparator circuit generates a first pulse when a frequency voltage reaches a first referenc... | 01/04/2011 |
| 7843279 | Low temperature coefficient oscillator A low temperature coefficient oscillator including a current generator, a first and a second voltage generator, an amplifier, a resistor, a switch, a capacitor and an oscillating unit is provided. The current generator generates a first through a fourth current acco... | 11/30/2010 |
| 7760037 | Process, voltage, and temperature compensated clock generator According to some embodiments, a process, voltage, and temperature compensated clock generator is disclosed. The clock generator may be a charge-charge clock generator including a first load capacitive element and a second load capacitive element. A process, voltage... | 07/20/2010 |
| 7733191 | Oscillator devices and methods thereof Oscillator devices and methods of operating such oscillator devices are disclosed. The oscillator devices include a current source, and an oscillation module to provide a clock signal. The frequency of the clock signal depends on the relationship between a threshold... | 06/08/2010 |
| 7728681 | Temperature and process independent voltage controlled oscillator circuit Techniques for voltage controlled oscillator (VCO) circuits that are independent of temperature and process variations are described herein. ... | 06/01/2010 |
| 7724100 | Oscillator structure An oscillator structure has a sync signal processor with an input interface for an external clock based sync signal and an output interface for a duty cycle indication signal depending on a signal property of the sync signal and an oscillator with an input interface... | 05/25/2010 |
| 7679464 | Method and apparatus for frequency modulating a periodic signal of varying duty cycle A method and apparatus for frequency modulating a PWM involves 1) generating a high frequency carrier signal much greater in frequency than the PWM signal; 2) modulating the high frequency signal to generate a spread spectrum carrier signal; and, 3) retiming a PWM s... | 03/16/2010 |
| 7642872 | Low cost and low variation oscillator An oscillator circuit for use in integrated circuits. The oscillator circuit includes a delay generation circuit having a current mirror with at least a first current mirror branch and a second current mirror branch, a current source coupled to the first current mir... | 01/05/2010 |
| 7538629 | Oscillator circuit The invention provides an oscillator circuit that reduces the dependence of an oscillation frequency on a power supply voltage. A charging and discharging circuit is a circuit switchable between an initializing operation setting an initial voltage for discharge and ... | 05/26/2009 |
| 7486150 | Electric circuit and oscillator comprising said electric circuit An electric circuit includes a circuit path from a first reference voltage to a second reference voltage lower than the first reference voltage. The path includes a current generator, a capacitor, a first switching element suitable for connecting or disconnecting th... | 02/03/2009 |
| 7474162 | RC-oscillator circuit An RC oscillator circuit is disclosed. The RC oscillator circuit includes a current generator configured to generate a charge current. The RC oscillator circuit also includes an integrator having an input and an output, the input being connected to the current gener... | 01/06/2009 |
| 7443255 | Oscillator circuit and method for adjusting oscillation frequency of same An oscillator comprises a data storage unit, an oscillation unit, and a control unit. The data storage unit is adapted to store a plurality of reference condition codes and a plurality of reference control codes. The oscillation unit is adapted to output an oscillat... | 10/28/2008 |
| 7443254 | Relaxation oscillator with propagation delay compensation for improving the linearity and maximum frequency A tunable oscillator comprises a control supply configured to output a control output operable to tune the tunable oscillator. The tunable oscillator further comprises an oscillator circuit configured to output a signal such that a frequency of the signal increases ... | 10/28/2008 |
| 7439818 | Voltage-and temperature-compensated RC oscillator circuit An integrated temperature-compensated RC oscillator circuit includes an inverter having an input and an output. An RC network is coupled between the inverter and a pair of comparators. A first comparator has an inverting input coupled to a first reference voltage, a... | 10/21/2008 |
| 7420431 | RC oscillator integrated circuit including capacitor An RC oscillator integrated circuit includes: an active current mirror connected to an external resistor, for receiving a current signal corresponding to a voltage signal applied to the external resistor, performing 1/N-times division of the received current signal ... | 09/02/2008 |
| 7388444 | Switching regulator duty cycle control in a fixed frequency operation A clock oscillator system for use in providing the switching regulator duty cycle control in a fixed frequency (no cycle skipping) operation is provided. In one embodiment, the circuit according to the invention uses an analog feedback loop to extend the switch ON t... | 06/17/2008 |
| 7385453 | Precision oscillator having improved temperature coefficient control A free running clock circuit includes a switching circuit for switching between first and second logic states at a predetermined frequency based upon a trip voltage the switching circuit has a programmable temperature profile associated therewith. The switching circ... | 06/10/2008 |
| 7375599 | Analog circuit and method for multiplying clock frequency A signal generating circuit includes a relaxation oscillator operating to alternately generate a first ramp signal that is periodic at a frequency of the relaxation oscillator and a second ramp signal that is periodic at the frequency of the relaxation oscillator an... | 05/20/2008 |
| 7372338 | Self-adjusting clock generator with stable frequency output A self-adjusting clock generator is disclosed. The self-adjusting clock generator comprises a voltage control oscillator for generating a frequency output, a frequency to voltage converter for converting the frequency output into a voltage output, and a comparator f... | 05/13/2008 |
| 7365565 | Programmable system on a chip for power-supply voltage and current monitoring and control A programmable system-on-a-chip integrated circuit device includes a programmable logic block, at least one user non-volatile memory block, and voltage-measuring and control analog and digital circuits on a single semiconductor integrated circuit chip or a flip chip... | 04/29/2008 |
| 7365586 | Hysteresis-type input circuit Hysteresis circuit 10 is composed of three inverters 40, 42, 44. Node NB in hysteresis circuit 10 is connected to the input terminal of transition-detecting part 14 of transmission control part 12. Transition-detecting p... | 04/29/2008 |
| 7363078 | Intracardiac polarization signal stabilization Polarization signals, which represent voltages measured at a pacemaker electrode, are not constant and may drift. Polarization signal drift, which often precedes undesirable pace polarization artifacts, is more significant when the pacemaker is inhibited from provid... | 04/22/2008 |
| 7355300 | Solid state turbine engine ignition exciter having elevated temperature operational capability A turbine engine ignition exciter circuit applies energy stored in the exciter tank capacitor to the load (igniter plug) through a thyristor type semiconductor switching device that minimizes leakage current at elevated operating temperatures. The semiconductor swit... | 04/08/2008 |
| 7352206 | Integrated circuit device having state-saving and initialization feature An integrated circuit device has a state-saving feature and includes a programmable logic block, I/O pads, a dedicated register, at least one volatile memory block, a non-volatile memory block, a condition-sensing circuit for detecting at least one condition, A cont... | 04/01/2008 |
| 7348860 | Triple-input relaxation oscillator with differential controllability There are provided relaxation oscillators and methods for controlling the same. A relaxation oscillator includes a load device, a switching device, a fine-tuning varactor, and a current source. The load device is configured to provide a variable oscillator output ba... | 03/25/2008 |
| 7342463 | Timer circuits and method A timing circuit operates by applying an arbitrary voltage across a resistance, and using the resulting current to generate a charging current which charges and/or discharges a capacitance to an endpoint voltage. Additional circuitry is arranged such that the capaci... | 03/11/2008 |
| 7339365 | Phase detector and method of phase detection In order to provide a phase detector and a method of phase detection which are distinguished by greater sensitivity and simple implementability, at least one differential signal of two input signals (Ua; Ub) may be formed over at least one pred... | 03/04/2008 |
