Did You Know...
...that a workman who left the soap mixing machine on too long was responsible for making Ivory Soap? He was so embarrassed by his mistake that he threw the mess in a stream. Imagine his dismay when the evidence of his error floated to the surface! Result: Ivory soap, the soap that floats.
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| Number | Title | Issue Date |
| 8067993 | Constant current driven oscillating circuit There is provided a constant current driven oscillating circuit including: an oscillator with first and second ends; a first field effect transistor that turns ON when a signal of a lower level than a first threshold voltage is input to a first gate terminal, and ou... | 11/29/2011 |
| 8044731 | Oscillator circuit There is provided an oscillator circuit including: a current source; a resonant unit; an oscillation amplification unit connected to the current source and connected in parallel to the resonant unit; a feedback resistor connected in parallel to the oscillation ampli... | 10/25/2011 |
| 7940138 | Electrostatic discharge protection oscillation circuit in LSI An oscillation circuit according to the present invention comprises a solid-state oscillator, an amplifier for feedback-controlling the solid-state oscillator, and ESD protecting circuits respectively connected to the input and output sides of the amplifier, wherein... | 05/10/2011 |
| 7863993 | Oscillator for providing oscillation signal with controllable frequency An oscillator, including amplifier circuitry and resonant circuitry, for providing an oscillation signal with a controllable frequency while maintaining a substantially constant steady state magnitude. Controllable reactive circuitry, included as part of the amplifi... | 01/04/2011 |
| 7855609 | Ultrasonic transducer driving circuit and ultrasonic diagnostic apparatus With the aim of suppressing power consumption and reducing circuit size, a positive FET is turned on in accordance with a positive pulse signal and turned off when a return voltage rises up to a positive threshold. An active ground clamp circuit causes the output li... | 12/21/2010 |
| 7834710 | Oscillator circuit and electronic device having oscillator circuit An oscillator circuit includes a first terminal, a second terminal, a resonator that is connected to the first terminal and the second terminal, a first capacitor that is connected to the first terminal and a ground line supplying the ground electric potential, a se... | 11/16/2010 |
| 7768359 | Low phase noise differential crystal oscillator circuit A differential crystal oscillator circuit uses a bias transistor to generate a bias voltage from a bias current. The bias voltage is supplied to the control terminals of a differential pair of transistors. The differential transistors operate to produce a differenti... | 08/03/2010 |
| 7724101 | Crystal oscillator circuit with amplitude control A crystal oscillator circuit includes a capacitive load stage coupled to a crystal; an amplifier stage including an amplifying transistor coupled to the crystal and to the capacitive load stage for establishing an oscillation signal at the amplifier stage output and... | 05/25/2010 |
| 7683728 | Oscillation circuit An oscillation circuit according to the present invention comprises a solid-state oscillator, an amplifier for feedback-controlling the solid-state oscillator, and ESD protecting circuits respectively connected to the input and output sides of the amplifier, wherein... | 03/23/2010 |
| 7564317 | High/low voltage tolerant interface circuit and crystal oscillator circuit A high/low voltage tolerant interface circuit and a crystal oscillator circuit using the same are provided herein. The interface circuit includes a first transistor, a bulk-voltage generator module and an bias module. The first transistor includes a gate, a first so... | 07/21/2009 |
| 7560999 | Oscillation circuit An oscillation circuit, including: a complementary metal oxide semiconductor (CMOS) inverter coupled between a first potential and a second potential; a first element unit whose one terminal is coupled to an input terminal of the CMOS inverter; a second element unit... | 07/14/2009 |
| 7532079 | Digital tuning of crystal oscillators Embodiments feature techniques and systems for digitally tuning a crystal oscillator circuit. In one aspect, embodiments feature a method for making a digitally tuned crystal oscillator circuit. The method involves receiving a multi-bit input signal into a digital m... | 05/12/2009 |
| 7471163 | Oxide overstress tolerant crystal oscillator An oscillator circuit includes a plurality of transistors that can withstand relatively low gate-to-source and gate-to-drain voltages. The oscillator circuit interfaces with an oscillator that oscillates at a relatively high voltage. The oscillator circuit includes ... | 12/30/2008 |
| 7439820 | Reducing the settling time of a crystal oscillator A method and system for initiating the oscillation of a crystal that controls a crystal oscillator by applying an initiating pulse to said crystal. The initiating pulse having a pulse width less than one half the periodicity of said crystal. ... | 10/21/2008 |
| 7432772 | Electrical oscillator circuit and an integrated circuit An electrical oscillator circuit (301, 302) comprising: a resonator (303) comprised in the first subcircuit (301); and an active device (309) comprised in the second subcircuit (302) connected to energize the resonator (303)... | 10/07/2008 |
| 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 |
| 7411466 | Coil-less overtone crystal oscillator An overtone crystal oscillator including a crystal, multiple amplifiers and an RC network. The crystal has a fundamental resonance frequency and at least one overtone resonance frequency. The amplifiers are coupled in series between terminals of the crystal and the ... | 08/12/2008 |
| 7391279 | Inverting amplifier and crystal oscillator having same A bypass capacitance is connected to a node between first and second self-bias resistances connected in series between an input and an output of an inverter. The bypass capacitance accommodates changes in the output voltage of the inverter to suppress the feedback e... | 06/24/2008 |
| 7391278 | Oscillator with stacked amplifier Embodiments of the invention provide a low-power, high-gain amplifier for a crystal oscillator. In some embodiments, the oscillator amplifier circuit comprises two NMOS transistors stacked in series with a PMOS transistor. In various embodiments, each of the NMOS tr... | 06/24/2008 |
| 7388445 | Piezoelectric oscillator for quadrature modulation A quartz oscillator for quadrature modulation has a quartz oscillating circuit including a transistor, a quartz oscillator, a capacitor, and a resistor, a double-mode quartz filter, a reactance element, and an amplifier. The quartz oscillator is constituted so that ... | 06/17/2008 |
| 7375600 | Integrated quartz oscillator circuit An integrated quartz oscillator circuit is disclosed having a capacitive voltage divider, which has a first capacitor and a second capacitor, as well as having a first transconductance amplifier, which is placed in a loop connecting a first terminal and a second ter... | 05/20/2008 |
| 7372342 | Oscillator A high-performance crystal oscillator providing effective bias resistors with low power consumption and minimal substrate surface area. In various embodiments of the invention, a switched-capacitor resistor is operably coupled to circuit components, such as an oscil... | 05/13/2008 |
| 7369005 | Colpitts oscillator Oscillation in which unwanted vibration (B mode) is surely suppressed while stable oscillation by principal vibration (C mode) is obtained is obtained. In a Colpitts oscillator including a piezoelectric vibrator, a transistor, and a first and second divided capaciti... | 05/06/2008 |
| 7362190 | Oscillator circuit with high pass filter and low pass filter in output stage An integrated circuit has an internal oscillator circuit for being connected to an external frequency source such as a crystal or a ceramic resonator. The internal oscillator circuit has an inverting amplifier across the frequency source terminals to establish an os... | 04/22/2008 |
| 7363648 | Cable modem tuner An IF input signal corresponding to a selected reception channel is applied through an SAW filter to an IF-AGC circuit, the amplitude of the signal is adjusted to a prescribed level, and the signal is thereafter supplied to a down converter unit. The down converter ... | 04/22/2008 |
| 7352256 | Crystal oscillation circuit A crystal oscillation circuit can correctly suppress the resonance of a B mode, thereby correctly excite the resonance of a C mode. Since the crystal oscillation circuit uses a quartz oscillator of an SC cut or an IC cut, the B mode (unnecessary mode) frequency is c... | 04/01/2008 |
| 7352255 | Circuit, system, and method for fine tuning crystal frequency accuracy Circuits, systems, and methods for fine tuning crystal frequency accuracy are disclosed. One such circuit fine tunes crystal frequency accuracy with a tunable fractional capacitance. The circuit includes an effectively constant capacitance coupled, e.g., fixedly, wi... | 04/01/2008 |
| 7339441 | Circuit and method for quickly turning off MOS device An OTA driving an MOS device needs to turn it off quickly to minimize overshoot during a heavy to light load state. The drains of the MOS device can be used to accelerate turning off the MOS device. A first drain is connected to the gate of the MOS device. A second ... | 03/04/2008 |
| 7332977 | Crystal clock generator operating at third overtone of crystal's fundamental frequency A crystal oscillator operates at the third overtone of the crystal's fundamental frequency. A value of a shunt resistor between the two phase-shift leg nodes is chosen so that the absolute value of the product gm×(Xc1)×(Xc2) is greater than the effec... | 02/19/2008 |
| 7327200 | Device for operating a vibrating unit of a vibration resonator A device for operating an oscillatable unit of a vibration resonator, including a piezodrive, which is connected with the oscillatable unit, and feedback electronics. The feedback electronics excites the piezodrive to oscillate by means of a periodic exciter signal ... | 02/05/2008 |
| 7292114 | Low-noise high-stability crystal oscillator Circuits, methods, and apparatus that provide low-noise, high-stability crystal oscillators having controlled-amplitude differential output signals and DC level control. A crystal oscillator circuit has two feedback loops, one for setting the DC level of its signals... | 11/06/2007 |
| 7292117 | Temperature-compensated piezoelectric oscillator A temperature compensated piezoelectric oscillator includes: an oscillation circuit that drives a piezoelectric element with a current; a direct-current-stopping fixed capacitor; a frequency-temperature compensated circuit that compensates the deviation of an oscill... | 11/06/2007 |
| 7283006 | Voltage-controlled oscillator An oscillator circuit configured by a feedback resistance 1, an amplifier 2 and a quartz vibrator 3 has a load resistance. MOS transistors 5, 6 short-circuited at source and drain terminals has a capacitance, as a variable capacitance, oc... | 10/16/2007 |
| 7280001 | Capacitor array segmentation In one embodiment, the present invention includes a capacitor array that may provide a selected capacitance to a digitally controlled crystal oscillator (DCXO). The array may include multiple sections each having at least one array portion, where each section is to ... | 10/09/2007 |
| 7279998 | Voltage-controlled oscillator With a variable capacitor including a load capacitor of an oscillation circuit having a feedback resistor 1, an inverter 2, and a crystal oscillator 3, and a static capacitance generated between a drain terminal and a gate terminal of MOS transi... | 10/09/2007 |
| 7276984 | Oscillation circuit capable of having stable oscillation in wide temperature range An oscillation circuit includes a constant current source, a current mirror circuit configured to receive a constant input current from the constant current source and to output a current proportional to the constant input current, a first inverter configured to be ... | 10/02/2007 |
| 7268636 | Voltage controlled oscillator In a voltage controlled oscillator including an amplifier, a feedback circuit and a crystal oscillator, two MOS transistors M1, M2 are connected for use as variable capacity elements for the frequency adjustment of the voltage controlled oscillator. Dr... | 09/11/2007 |
| 7265641 | Oscillator circuit arrangement with an automation feedback control A circuit arrangement for generating oscillations with a defined frequency includes an oscillator circuit (30, 32) for generating the oscillations and a dedamping circuit (18, 20) connected to the oscillator circuit for compensating any damping of the ... | 09/04/2007 |
| 7262671 | Amplitude level control circuit Amplitude level control circuit for an oscillator comprising first means arranged to generate a first current for driving the oscillator; and second means arranged to generate a second current such that in direct current conditions the second current is arranged to ... | 08/28/2007 |
| 7245519 | Digitally programmable capacitor array A programmable capacitor array does not require separate switching transistors because the capacitors themselves have a switchable capacitance, which capacitors are made in the manner of regular N channel transistors with their source/drains connected to each other.... | 07/17/2007 |
