Did You Know...
...that one person who claimed to be the inventor of the television is Russian emigre Vladimir Zworykin? In 1929 David Sarnoff, founder of RCA, asked Zworykin what it would take to develop TV for commercial use. He said: a year and a half and $100,000. In reality, it took 20 years and $50 million! Before his death in 1982 at the age of 92, Zworykin said of his invention: "The technique is wonderful. It is beyond my expectations. But the programs! I would never let my children even come close to this thing."
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| Number | Title | Issue Date |
| 8044735 | Oscillator circuit and method for influencing, controlling, or regulating the frequency of an oscillator An oscillator circuit according to the invention comprises an oscillator with a toggle circuit having an output and an inverting input, whereby the output is connected to the inverting input via a feedback resistor, the inverting input is connected, for example, to ... | 10/25/2011 |
| 8026770 | Relaxation oscillator The relaxation oscillator includes a comparator and a latch. The comparator includes a comparator output and a comparator input that is configured to receive a first input signal in response to a first signal and configured to receive a second input signal in respon... | 09/27/2011 |
| 7994869 | Current-controlled hysteretic oscillator The disclosed current-controlled hysteretic oscillator operates by controlled currents opposing each other in differential pairs to set a controlled hysteresis for improved relaxation oscillations with immunity to phase or frequency error. ... | 08/09/2011 |
| 7902932 | Variable-frequency oscillator There is provided a frequency-variable oscillator that varies, even when a frequency of an input signal is varied, a frequency of an oscillation signal according to the varied frequency of the input signal. The frequency-variable oscillator includes: a voltage-to-cu... | 03/08/2011 |
| 7884679 | Process, voltage, temperature compensated oscillator A voltage reference connects to a voltage-to-current converter to generate a reference current dependent on the reference voltage. Outputs of a toggle-type flip flop connect to switching transistors controlling the reference current charging capacitors. The toggling... | 02/08/2011 |
| 7884678 | Single-pin RC oscillator Apparatus includes a single-pin input interface, which is operative to sense a voltage across a capacitor of a Resistor-Capacitor (RC) network in which the capacitor is repetitively charging and discharging so that the voltage oscillates as a function of time. A mea... | 02/08/2011 |
| 7852166 | Relaxation oscillator for compensating system delay A relaxation oscillator compensates for system delay. The relaxation oscillator includes first and second input signal units that generates first and second capacitor voltages, a delay compensation unit that receives a reference voltage and the first and second capa... | 12/14/2010 |
| 7847648 | Oscillator with delay compensation In the many microelectronics applications, delays present in circuitry can affect both the design and the function of the circuitry. One example of delays impacting the function of a circuit is a relaxation oscillator, where delays present in comparator circuits and... | 12/07/2010 |
| 7834711 | Variable-frequency oscillator There is provided a frequency-variable oscillator that varies, even when a frequency of an input signal is varied, a frequency of an oscillation signal according to the varied frequency of the input signal. The frequency-variable oscillator includes: a voltage-to-cu... | 11/16/2010 |
| 7808331 | Current-controlled oscillator Widening the frequency range without increasing the power consumption. Current circuits output charge current based on control current. Capacitors are provided in association with the current circuits and store the charge current. Discharge transistors are provided ... | 10/05/2010 |
| 7800456 | Method of forming an oscillator circuit and structure therefor In one embodiment, an oscillator circuit is configured to oscillate at a base frequency. The oscillator is configured to receive a synchronization signal and restart a period of the oscillator signal responsively to the synchronization signal. ... | 09/21/2010 |
| 7701305 | Frequency jittering control for varying the switching frequency of a power supply A frequency jittering circuit modulates a hysteretic band of an oscillator such that the clock generated by the oscillator has a jitter frequency, and thus a switching mode power supply operative on the clock will have a jittering switching frequency. ... | 04/20/2010 |
| 7612624 | Resistor-capacitor oscillation circuit capable of adjusting oscillation frequency and method of the same An RC oscillation circuit and method capable of adjusting an oscillation frequency includes: an RC oscillator including a variable resistor and a variable capacitor, the RC oscillator generating an RC oscillating signal having a frequency determined by a resistance ... | 11/03/2009 |
| 7612623 | Micropower RC oscillator A micropower RC oscillator comprises a current generating section including a current source that generates a current; and a variable resistor of which the magnitude is variably set and which is configured by combining resistor elements at a predetermined ratio, the... | 11/03/2009 |
| 7602258 | Circuits, systems, and methods for a voltage controlled oscillator with coarse, fine, and center tuning Circuits, systems, and methods for generating a variable oscillator output. The circuits generally comprise a capacitor configured to receive first and second currents of a first polarity (e.g., charging currents) and a third current of a second polarity opposite to... | 10/13/2009 |
| 7579918 | Clock generator with reduced electromagnetic interference for DC-DC converters A clock generator includes a current source for generating a constant current; a current mirror coupled between a supply voltage and the current source for generating a mirror current equal to the constant current multiplied by a predetermined value; and a charge co... | 08/25/2009 |
| 7551041 | Oscillator and method for operating an oscillator An oscillator is provided that includes at least one capacitor, at least one comparator, and at least one device for charging or discharging the at least one capacitor. The capacitor is coupled to the comparator. The comparator compares the voltage on the capacitor ... | 06/23/2009 |
| 7548129 | On-chip R-C time constant calibration An integrated tuner includes circuitry to receive a television signal, a quadrature mixer coupled to the output of the circuitry, a polyphase filter coupled to the output of the quadrature mixer, a relaxation oscillator, and a digital calibration module. The relaxat... | 06/16/2009 |
| 7525394 | Ultra low power CMOS oscillator for low frequency clock generation An ultra low power relaxation CMOS oscillator for low frequency clock generation comprises a current source and a pair of capacitors that are alternatingly charged by the current source and discharged by thyristor-based inverters being used as comparators. No separa... | 04/28/2009 |
| 7486151 | Semiconductor circuit for use in timer circuit or oscillator circuit In a timer circuit of a semiconductor circuit including a current source driven by a power supply voltage, the current source outputs a current dependent on the power supply voltage, and outputs a reference voltage obtained when the power supply voltage is dropped b... | 02/03/2009 |
| 7474163 | System and method for oscillator noise cancellation The invention relates to an electronic circuit comprising a first comparator having a first input offset voltage, wherein the first comparator is operatively coupled to a first sampling capacitor, a second comparator having a second input offset voltage, wherein the... | 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 |
| 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 |
| 7337294 | Method and apparatus for adjusting the performance of a synchronous memory system A method and apparatus for adjusting the performance of a memory system is provided. A memory system comprises a master device and a slave device. A memory channel couples the master device to the slave device such that the slave device receives the system operating... | 02/26/2008 |
| 7317362 | Oscillator circuit and oscillation control method An oscillator circuit is disclosed that includes a first oscillation part configured to output a first oscillation output by charging and discharging a first capacitor, and a second oscillation part configured to output a second oscillation output by charging and di... | 01/08/2008 |
| 7280000 | Apparatus and method for reducing power consumption within an oscillator An oscillator according to the present invention reduces power consumption by enlarging the pulsewidth of an oscillator output pulse. Since this pulse disables an oscillator current source, the enlarged pulsewidth reduces the time the current source is enabled. When... | 10/09/2007 |
| 7271670 | CR oscillation circuit A CR oscillation circuit comprises first and second logic elements, a capacitive element, and a resistive element. The first logic element is connected between a first node and a second node. The second logic element is connected between the second node and a third ... | 09/18/2007 |
| 7268639 | Pulse width modulation circuit The present invention provides a pulse width modulation (PWM) circuit comprising an PWM control circuit for setting an output signal to low when a logical level of a oscillation signal at a first input terminal changes from low to high, for resetting the output leve... | 09/11/2007 |
| 7239182 | Predriver circuit A predriver circuit that is capable of reducing the size of a drive transistor while preventing a drive transistor's gate from being destroyed, thereby reducing power consumption. The predriver circuit includes a current mirror circuit, which has a pair of transisto... | 07/03/2007 |
| 7236034 | Self correcting scheme to match pull up and pull down devices The self correcting scheme to match pull up and pull down devices includes: a first comparator for comparing a common mode signal to a high reference limit; a second comparator for comparing the common mode signal to a low reference limit; a first flip flop having a... | 06/26/2007 |
| 7236061 | Temperature compensated refresh clock circuit for memory circuits A memory circuit that generates a positive temperature correlated clock frequency is described. One embodiment includes a voltage reference having a voltage determined at least in part by a diode or transistor having a negative temperature coefficient. A clock gener... | 06/26/2007 |
| 7233213 | Oscillator of semiconductor device An oscillator of a semiconductor memory device, wherein a reference voltage that flexibly shifts according to the shift in a power supply voltage is generated, and a reference clock is generated using the reference voltage. It is thus possible to generate the refere... | 06/19/2007 |
| 7227422 | Temperature compensated R-C oscillator An R-C oscillator (200) is configured to vary the two voltage levels that are used to control the oscillation, such that the variation in oscillation frequency with temperature is minimized. A first resistor (R1) is used to control one of the voltage l... | 06/05/2007 |
