Bizarre Patents
A simulation environment for the sport of boxing utilizing a robotic machine interface system which carries a person.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 8169266 | Mixer circuits and methods Embodiments of the present invention include circuits and methods for improving the spectral purity of mixer circuits. In one embodiment the present invention includes a mixer circuit comprising a first transistor having a gate, a source and a drain, a second transi... | 05/01/2012 |
| 7777579 | Local oscillation generator with mixer having reduced signal power consumption According to one exemplary embodiment, a local oscillation generator includes a mixing stage for receiving a primary frequency and one of a number of related frequencies. The local oscillation generator further includes a first transconductance stage to provide a fi... | 08/17/2010 |
| 7701300 | Multi-frequency synthesizing apparatus and method for multi-band RF receiver A frequency synthesizing apparatus and method for a multi-band radio frequency (RF) receiver is provided. The frequency synthesizing apparatus includes a simple circuit configuration with a single SSB mixer and thus, may synthesize six high frequency signals. Signal... | 04/20/2010 |
| 7659784 | Injection-locked frequency divider An injection-locked frequency divider is provided. The injection-locked frequency divider includes a voltage control oscillator (VCO) and a mixer. The VCO includes a LC resonance tank and a negative-resistance generator for generating a differential oscillation sign... | 02/09/2010 |
| 7411461 | Frequency and/or phase lock loops with beat frequency estimation A control loop (10) for producing an output signal with a stable nominal frequency is provided. The control loop includes inputs for reference (11) and oscillator (25) output signals, a beat frequency generator (12) for producing a signal... | 08/12/2008 |
| 7323945 | Programmable radio transceiver A fully integrated, programmable mixed-signal radio transceiver comprising a radio frequency integrated circuit (RFIC) which is frequency and protocol agnostic with digital inputs and outputs, the radio transceiver being programmable and configurable for multiple ra... | 01/29/2008 |
| 7304547 | Method and apparatus to improve frequency stability of an integrated circuit oscillator An apparatus providing a simple low cost integrated circuit oscillator with improved frequency stability over a range of selected frequencies by reducing the impact of process and temperature variations on a base current of bipolar transistor of the integrated circu... | 12/04/2007 |
| 7284467 | Apparatus and method for detecting dangerous conditions in power equipment Woodworking machines are disclosed having electrically conductive cutting tools adapted to cut workpieces. The machines include a contact detection system capacitively coupled to the cutting tool, and adapted to detect contact between a person and the cutting tool. ... | 10/23/2007 |
| 7277683 | Regenerative divider for up and down conversion of radio frequency (RF) signals The present invention relates generally to communications, and more specifically to a method and apparatus for generating local oscillator signals used for up- and down-conversion of RF (radio frequency) signals. A major problem in the design of modulators and demod... | 10/02/2007 |
| 7272370 | Mixers with a plurality of local oscillators and systems based thereon A receiver apparatus including a main input for receiving the input signal and a first standard mixer having a first mixer input, a first local oscillator input, and a first mixer output. The first mixer input is connected to the main input and the first local oscil... | 09/18/2007 |
| 7271668 | Mixer circuits and methods with improved spectral purity Embodiments of the present invention include mixer circuits and methods with improved spectral purity. In one embodiment the present invention includes a mixer circuit comprising a first transistor having a gate, a source and a drain, a second transistor having a ga... | 09/18/2007 |
| 7251465 | Method and apparatus for producing mobile radio signals A method and device are provided for producing mobile radio signals, which utilize a direct conversion receiver, at least one first and one second local oscillator and one regenerative divider for processing signals according to different mobile radio standards. For... | 07/31/2007 |
| 7183698 | Piezoelectric structure A piezoelectric structure receives input from a voltage source to generate polarization and output voltage. Two surfaces are formed on the direction normal to the polarized direction. One surface has an input electrode electrically connecting to the voltage source a... | 02/27/2007 |
| 7075957 | Controlling an optical source using a beat frequency An apparatus and method of controlling an optical signal includes superimposing at least one optical reference signal and the optical signal to obtain at least one interference signal having an actual beat frequency, and pre-selecting one or more of the at least one... | 07/11/2006 |
| 7053319 | Electronic weighing apparatus utilizing surface acoustic waves using sensors operating at different frequencies, having temperature compensation, and a push oscillator A weighing apparatus includes a SAW oscillator and a “push oscillator” to force the SAW oscillator into a desired mode of operation. A SAW temperature oscillator and a thermistor are also provided. The frequency of the “push oscillator” is made immune to tem... | 05/30/2006 |
| 7034625 | Method and apparatus to improve frequency stability of an integrated circuit oscillator A method and apparatus providing a simple low cost integrated circuit oscillator with improved frequency stability over a range of selected frequencies by reducing the impact of process and temperature variations on a base current of bipolar transistor of the integr... | 04/25/2006 |
| 6960962 | Local oscillator leakage control in direct conversion processes A system and method for generating a local oscillator (LO) frequency in a zero intermediate frequency (IF) receiver or transmitter is presented. A signal is received from a voltage controlled oscillator (VCO). The signal has a VCO frequency. The VCO frequency is div... | 11/01/2005 |
| 6898262 | Programmable controller An output cycle of a pulse string generated from a pulse generating section (2) is divided by a pulse dividing section (3) and a signal having a cycle which is plural times as great as the cycle of an output pulse is output from the pulse dividing sect... | 05/24/2005 |
| 6850121 | TDMA transmit frequency generator suppressing frequency jumps caused by feedback A transmit frequency is generated for a transceiver by a controllable oscillator which generates an oscillator frequency, a divider by a factor N, and a mixer stage with a subsequent band filter. Signals with the oscillator frequency and the oscillator frequency div... | 02/01/2005 |
| 6831493 | Duty cycle regulator A duty cycle regulator derives from an input clock of arbitrary duty cycle, an output clock having an adjustable duty cycle of similar frequency. The duty cycle regulator includes a bistable circuit for receiving an input clock pulse and providing the output clock, ... | 12/14/2004 |
| 6756828 | Phase lock loop (PLL) apparatus and method A phase lock loop (PLL) and methods for using same is provided that includes a multiple-feedback CMOS voltage control oscillator (VCO) and multi-phase sampling fractional-N prescaler. The PLL provides increased performance characteristics for a single chip CMOS radi... | 06/29/2004 |
| 6593784 | Post-silicon bias-generator control for a differential phase locked loop A technique for adjusting a bias-generator in a phase locked loop after fabrication of the phase locked loop is provided. The technique involves use of an adjustment circuit operatively connected to the bias-generator, where the adjustment circuit is cont... | 07/15/2003 |
| 6566925 | Duty-cycle regulator A duty-cycle regulation method for deriving an output clock signal having a predetermined duty cycle from an input clock signal having an arbitrary duty cycle. Once the input clock signal is received, an output clock storage element is switched to a first... | 05/20/2003 |
| 6535040 | Duty cycle correction circuits that reduce distortion caused by mismatched transistor pairs A duty cycle correction circuit includes a duty cycle corrector and a detection circuit. The duty cycle corrector generates a first input signal having a second duty cycle with a higher degree of equivalence than the first duty cycle in response to a firs... | 03/18/2003 |
| 6518809 | Clock circuit with self correcting duty cycle An apparatus including a driver and an adjustment circuit. The driver circuit may be configured to generate an output signal in response to a clock input signal and an adjustment signal. The adjustment circuit may be configured to generate the adjustment ... | 02/11/2003 |
| 6459341 | Voltage controlled oscillation device A voltage controlled oscillation device includes a voltage controlled oscillator, fixed-frequency oscillator, frequency mixer, and frequency selector. The voltage controlled oscillator changes the output signal frequency in the microwave band in accordanc... | 10/01/2002 |
| 6424192 | Phase lock loop (PLL) apparatus and method A phase lock loop (PLL) and methods for using same is provided that includes a multiple-feedback CMOS voltage control oscillator (VCO) and multi-phase sampling fractional-N prescaler. The PLL provides increased performance characteristics for a single chi... | 07/23/2002 |
| 6404293 | Adaptive radio transceiver with a local oscillator An oscillator circuit is disclosed which includes an oscillator to generate a first signal having a first frequency, a second oscillation source to generate a second signal having a second frequency, the second oscillator comprising a frequency divider co... | 06/11/2002 |
| 6285063 | Resonant circuit having a resonant body mechanically oscillated by electrostatic or magnetic forces The resonant circuit has at least one resonant body of a semiconductor material anchored on the surface of a semiconductor substrate, at least one first electrode being arranged at said semiconductor material, and at least one second electrode. The first ... | 09/04/2001 |
| 6194931 | Circuit for generating backbias voltage corresponding to frequency and method thereof for use in semiconductor memory device Backbias voltage generation circuit corresponding to the frequency of a chip control signal is disclosed. The circuit includes a normal driving unit, an active driving unit and a level detecting unit. The level detecting unit detects whether a backbias vo... | 02/27/2001 |
| 6163229 | Frequency generator for generating two independent FSK signals A frequency generating circuit scales a warp range of a frequency signal. The frequency generating circuit includes a first frequency signal (10) having a first offset signal with a first frequency relationship to the first frequency signal, and a second ... | 12/19/2000 |
| 6151076 | System for phase-locking a clock to a digital audio signal embedded in a digital video signal A system for phase-locking a clock to a digital audio signal embedded within a digital video signal uses an audio extractor, frequency dividers, and an adjusted bandwidth loop filter to prevent phase jitter associated with the digital audio signal prevent... | 11/21/2000 |
| 6060922 | Duty cycle control buffer circuit with selective frequency dividing function A duty cycle control buffer uses an edge detector input stage to detect the transitions of an unpredictable clock signal input. The edge detector generates one shot output signals in synchronism with the clock signal. A pulse width controllable monostable... | 05/09/2000 |
| 5982240 | Voltage controlled oscillator using a plurality of switchable oscillators A voltage controlled oscillator comprises first oscillating stage for outputting a first frequency signal, second oscillating stage for outputting a second frequency signal different from the first frequency signal, a buffer stage connected with said firs... | 11/09/1999 |
| 5952834 | Low noise signal synthesizer and phase noise measurement system A phase noise measurement system including a low noise programmable synthesizer and a receiver/down converter is provided. The low noise synthesizer provides L-Band Signals which can selectively exhibit low noise close-in or low noise far out. The receive... | 09/14/1999 |
| 5926641 | Clock frequency change circuit A circuit for controlling clock frequency change circuitry to control a frequency of a system clock in response to a clock frequency indication, wherein operating circuitry of an electronic system operates responsive to the system clock. First flip-flop c... | 07/20/1999 |
| 5821825 | Optically controlled oscillator An optically controlled oscillator utilizes a HEMT or a PIN diode as a photodetector and either a HEMT or HBT as an active inductor. The optically controlled HEMT active inductor provides a means for tuning the frequency of the oscillator. The optical rec... | 10/13/1998 |
| 5770977 | Microwave frequency synthesizer with ultra-fast frequency settling and very high frequency resolution The ability to achieve ultra-fast frequency settling times with good frequency resolution and high absolute accuracy over significant bandwidth at microwave frequencies ranging over three octaves. The implementation is an open-loop system requiring little... | 06/23/1998 |
| 5604690 | Signal form synthesizer arrangement, transmitter station and receiver station comprising such an arrangement A signal form synthesizer comprises a digital generator circuit (1) for generating the synthesis signal to produce a first series of digital samples which are representative of this signal and formed by binary words of N bits, and a digital-to-analog conv... | 02/18/1997 |
| 5578969 | Split dielectric resonator stabilized oscillator A split dielectric resonator having two preferably half cylindrical dielectric elements is used to stabilize an oscillator operating at microwave frequencies. Fine tuning may be achieved by means of a tuning screw which has a thermal expansion coefficient... | 11/26/1996 |
