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3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 8164392 | Error-free startup of low phase noise oscillators An isolation switch is used to isolate the output of an oscillator, during startup of the oscillator, from the circuitry that uses the periodic signal generated by the oscillator. In one implementation, a device may include an oscillator to generate a periodic signa... | 04/24/2012 |
| 7969251 | Fractional divider A divider control circuit includes a first and a second delta sigma modulator configured to generate a divider control signal for a fractional-N divider and a fractional signal indicative of a phase error in the divider output. The fractional signal is supplied for ... | 06/28/2011 |
| 7961058 | Frequency divider using an injection-locking-range enhancement technique A locking range enhancement technique is described that steers away part of the DC current and reuses it to generate more injected AC current to the injection-locked resonator-based frequency dividers (ILFDs). The injection-enhanced ILFDs maintain the key features o... | 06/14/2011 |
| 7940132 | Clock system and applications thereof A clock system includes a phase locked loop, a phase divider, and a control module. The phase locked loop (PLL) produces a plurality of phase-offset output oscillations. The phase divider generates a clock signal from one or more of the plurality of phase-offset out... | 05/10/2011 |
| 7911283 | Low noise oscillator and method A low noise oscillator includes a resonator 102 that is excited with a pulsed signal (i.e., an impulse of energy) to replace energy lost to parasitic resistive losses once every Nth period (where N=1, 2, 3 . . . ). The resonating signal is monitored by a leve... | 03/22/2011 |
| 7889014 | Ring based impedance control of an output driver One embodiment in accordance with the invention is a method that can include utilizing a ring oscillator module to determine a process corner of an integrated circuit as fabricated that includes the ring oscillator module. The impedance of an output driver of the in... | 02/15/2011 |
| 7872538 | Impulse generation circuit An impulse generation circuit is provided for generating an impulse using a transmission line. Impulse characteristics of the impulse generation circuit are varied with the length of a transmission line rather than the characteristic variation of various devices use... | 01/18/2011 |
| 7847645 | Oscillation control apparatus and oscillator An oscillation control apparatus is provided with: an oscillating unit for oscillating an oscillating element; an output amplifying circuit having two pieces of same types of transistors series-connected to each other, for outputting a signal from a junction point b... | 12/07/2010 |
| 7839225 | Direct digital interpolative synthesis A clock synthesis circuit includes a delta sigma modulator that receives a divide ratio and generates an integer portion and a digital quantization error (a fractional portion). A fractional-N divider divides a received signal according to a divide control value cor... | 11/23/2010 |
| 7791422 | Voltage controlled oscillator with cascaded emitter follower buffer stages A voltage controlled oscillator (VCO) is provided that includes an output buffer having a first buffer stage including a first transistor and a second buffer stage including a second transistor. The first and second transistors are connected in a cascaded emitter fo... | 09/07/2010 |
| 7768358 | Oscillatory signal output circuit for capacitive coupling an oscillating signal with bias voltage applied Oscillatory signal output circuitry includes a bias circuit generating a bias voltage, which is applied to an amplifier and an oscillatory circuit to generate an oscillatory signal. The oscillatory signal is capacitively coupled and level-shifted up by the bias volt... | 08/03/2010 |
| 7764134 | Fractional divider A divider control circuit includes a first and a second delta sigma modulator configured to generate a divider control signal for a fractional-N divider and a fractional signal indicative of a phase error in the divider output. The fractional signal is supplied for ... | 07/27/2010 |
| 7764135 | Pulse shaping circuit for crystal oscillator A circuit arrangement and method utilize a variable threshold, multi-stage pulse shaping circuit to pulse shape a signal output by a crystal oscillator circuit. Each stage of the pulse shaping circuit includes a Schmitt trigger that drives an input of a latch, and t... | 07/27/2010 |
| 7728680 | Method and circuit configuration for transmitting a two-valued signal The present invention relates to a method for transmitting a two-valued signal via a channel, a pulse train being output after the change of a signal level of the two-valued signal, and subsequently to the pulse train, a backswing is output. The present invention al... | 06/01/2010 |
| 7724097 | Direct digital synthesizer for reference frequency generation A direct digital frequency synthesizer having a multi-modulus divider, a numerically controlled oscillator and a programmable delay generator. The multi-modulus divider receives an input clock having an input pulse frequency fosc and outputs some integer ... | 05/25/2010 |
| 7626467 | Automatic level control for radio frequency amplifiers The disclosure relates to an automatic level control technique for RF amplifiers in a communication system, such as a wireless communication system. The invention provides an automatic level control technique to compensate for variations in the gain of an RF amplifi... | 12/01/2009 |
| 7579917 | Output circuit for oscillator The object of the present invention is to provide a crystal oscillator with one IC capable of effectively responding to specifications or a frequency of an installed set, an output terminal of the oscillator 1 is connected to an input terminal of the inverter... | 08/25/2009 |
| 7573342 | VCO pre-compensation A VCO device is described that has pre-compensation. Digitally switchable compensation capacitors are selectively activated to adjust operation of the VCO to mitigate undesirable operational effects. In some example embodiments, the digitally switchable compensation... | 08/11/2009 |
| 7501905 | Oscillator circuit, PLL circuit, semiconductor chip, and test apparatus An oscillator circuit that generates an oscillation signal is provided. The oscillator circuit includes: a voltage controlled oscillator that outputs the oscillation signal with a frequency corresponding to a provided control voltage; and a jitter demodulator that e... | 03/10/2009 |
| 7489206 | High-frequency power device and method for controlling high-frequency power A high-frequency power device including: an oscillator; a high-frequency power supplier; a reflection coefficient calculator; a discharge signal output unit; and a frequency controller, wherein the frequency controller: instructs the oscillator to oscillate the osci... | 02/10/2009 |
| 7489205 | VCO buffer circuit A VCO buffer circuit comprising a first loading means receiving a first signal for loading the VCO at a first input node; a second loading means receiving a second signal for loading the VCO at a second input node; a third loading means coupled to said first loading... | 02/10/2009 |
| 7479836 | Oscillation circuit and semiconductor device comprising that oscillation circuit An oscillation circuit used in a semiconductor device such as a cell-based IC, and comprises: an inverting amplifier, which is constructed so that it is possible connect a crystal oscillator XL between its input and output terminals, and so that it is possible to ad... | 01/20/2009 |
| 7474161 | Charge pump circuit While a charge pump activation/deactivation control circuit is outputting a high level signal, MOS transistors for short-circuiting a flying capacitor are off, and the charge pump circuit operates normally. When the charge pump activation/deactivation control circui... | 01/06/2009 |
| 7463102 | Clock synthesizer with clock divider outside feedback loop and method thereof A de-skew multiplier clock synthesizer with a clock divider outside the feedback loop of a PLL is provided. The clock synthesizer includes a phase locked loop (PLL), a clock divider, and a phase comparator. The PLL receives a reference clock and generates a PLL outp... | 12/09/2008 |
| 7456696 | Circuit and method of compensating for signal delay in a cable The compensation circuit comprises an oscillator, a first variable delay line, a second variable delay line, a phase detector and a controller. The oscillator generates an oscillation signal to input into a first transmission line and a second transmission line. The... | 11/25/2008 |
| 7443253 | Detection device for detecting oscillator A detection device for detecting an oscillator is provided. The detection device includes an oscillator control circuit, a frequency-decreasing circuit and a display circuit. The oscillator control circuit is used for outputting the oscillator signal of the oscillat... | 10/28/2008 |
| 7432770 | Signal transmission device The present invention provides a signal transmission device in which jitter occurring in a clock signal is eliminated. The signal transmission device has a construction in which a transmission end IC chip provided with a transmission part of a data signal and a rece... | 10/07/2008 |
| 7432769 | Oscillator circuit The oscillating unit 11 generates a signal having a frequency of n*f, i.e., n times a target frequency f. The control voltage generation circuit 21 compares the phase difference between a divided signal of a signal generated in the oscillating unit ... | 10/07/2008 |
| 7429896 | Frequency stability measuring apparatus A frequency stability measuring apparatus for measuring a frequency fluctuation of a signal outputted from a given signal source includes: a reference signal output unit that outputs a reference frequency signal; a mixer that mixes a signal outputted from the signal... | 09/30/2008 |
| 7429898 | Clock signal generating circuit, semiconductor integrated circuit and method for controlling a frequency division ratio A clock signal generating circuit is disclosed. The clock signal generating circuit includes: a reference clock signal generating unit for generating a reference clock signal; a plurality of frequency dividing units for carrying out frequency dividing of the referen... | 09/30/2008 |
| 7429900 | Oscillator and semiconductor device An object is not only to contribute to reduction in current consumption but also to advance actuation of a system required in a camera, an on-vehicle electric component, etc. by shortening a waiting time for stabilization of oscillation. An oscillator having an inve... | 09/30/2008 |
| 7420430 | Method and arrangement for generating an output clock signal with an adjustable phase relation from a plurality of input clock signals Method and arrangement for generating an output clock signal with an adjustable phase relation from a plurality of input clock signals. A method and an arrangement are provided for generating an output clock signal (o), in which a plurality of input clock sig... | 09/02/2008 |
| 7417510 | Direct digital interpolative synthesis A clock synthesis circuit includes a delta sigma modulator that receives a divide ratio and generates an integer portion and a digital quantization error (a fractional portion). A fractional-N divider divides a received signal according to a divide control value cor... | 08/26/2008 |
| 7418614 | External signal detection circuit and real-time clock An external signal detection circuit includes an input port, to which a first end of a circuit including a pull-up resistor connected in series with a first switch portion is connected, the input port receiving an input of an external signal; an input detection port... | 08/26/2008 |
| 7414487 | Apparatus for providing an oscillating signal to a load An apparatus for providing an oscillating signal to a load comprises: a phase locked loop, PLL, comprising a feedback loop; a power control means for manipulating oscillating signal power; an isolator for isolating the feedback loop from the load; and a mode selecto... | 08/19/2008 |
| 7414484 | Voltage controlled oscillator circuitry and methods Voltage controlled oscillator (“VCO”) circuitry includes LC tank or ring VCO circuitry and frequency divider circuitry that divides the frequency output by the oscillator circuitry by a selectable integer factor that is at least 2 in the case of a ring oscillato... | 08/19/2008 |
| 7414486 | Device and method for power calibration of an oscillator It is therefore the object of the present invention to disclose a device for power calibration of an oscillator in the high-frequency range, which has a reduced number of components and/or has less-expensive components. A method for power calibration of an oscillato... | 08/19/2008 |
| 7397311 | Oscillator coupling to reduce spurious signals in receiver circuits A first receiver frequency reference is passively coupled to a second receiver by tapping a signal directly from the resonant element, such as a crystal, of an oscillator in the first receiver to drive the input of the second receiver. The sinusoidal signal from the... | 07/08/2008 |
| 7397315 | Oscillator and charge pump circuit using the same The present invention provides a current-limited oscillator capable of performing stable operation even when it is driven with a low power-supply voltage, and a charge pump circuit using the oscillator. A current-limited oscillator has a delay section that includes ... | 07/08/2008 |
| 7394323 | PLL frequency synthesizer A PLL frequency synthesizer improves near C/N, shortens lockup time, and reduces residual FM. In this apparatus, an input current signal is converted to a voltage signal by one of a plurality of loop filters with different cutoff frequencies and output to a voltage ... | 07/01/2008 |
