Celebrity Inventors
Mark Twain (Samuel L. Clemens) received Patent No. 121,992 for "An Improvement in Adjustable and Detachable Straps for Garments." He later received two more patents: one for a self-pasting scrapbook and one for a game to help players remember important historical dates.
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| Number | Title | Issue Date |
| 7791391 | Quadrature phase correction circuit A quadrature phase correction circuit includes an N-bit code counter configured to generate an N-bit code value according to a detected phase difference when a quadrature phase correction is carried out, N-bit code values are stored according to a plurality of detec... | 09/07/2010 |
| 7633325 | Signal generation apparatus for frequency conversion in communication system A signal generation apparatus includes a signal generation portion and a phase compensator. The phase compensator generates a phase error control signal that maintains a phase difference between the in-phase and quadrature-phase signals generated by the signal gener... | 12/15/2009 |
| 7535277 | Frequency dividing phase shift circuit A frequency dividing phase shift circuit includes a first frequency divider and a second frequency divider. The first frequency divider is configured to perform 1/(2n+1) (n is a natural number) frequency division on an input signal having a frequency of (freq*2(2n+1... | 05/19/2009 |
| 7304533 | Integrated channel filter using multiple resonant filters and method of operation A circuit includes a first filter comprising a first inductor coupled to a first variable capacitor, wherein the first filter is associated with a first resonant frequency. The circuit further comprises an amplifier coupled to the first filter and a second filter co... | 12/04/2007 |
| 7274922 | Circuit arrangement for generating an IQ-signal Circuits generate an IQ voltage or current signal having orthogonal I- and Q-parts of approximately equal amplitude from an electric input signal having a frequency varying slightly around a carrier frequency, without needing a complex mixer. The circuit includes at... | 09/25/2007 |
| 7271647 | Active polyphase filter The present invention provides methods and apparatuses for a polyphase filter, comprising: a first and second cascoded differential amplifiers configured to receive a first and second differential signals, the first cascoded differential amplifier having a first res... | 09/18/2007 |
| 7271622 | Quadrature voltage controlled oscillators with phase shift detector In wireless application there is made use of a quadrature oscillators that generate signals that are capable of oscillating at quadrature of each other. The quadrature oscillator is comprised of two differential modified Colpitts oscillators. A capacitor bank allows... | 09/18/2007 |
| 7242246 | Amplitude detecting method, AGC circuit gain controlling method, amplitude detecting apparatus and AGC amplifier circuit In an amplitude detecting circuit, a phase shifter, into which an alternating current signal that is outputted from an AGC circuit is inputted, outputs first and second alternating current signals between which there is a phase difference. In addition, full wave rec... | 07/10/2007 |
| 7227397 | System, method and circuits for generating a signal The present invention relates to the field of electronics. More particularly, forms of the present invention relate to systems, methods and circuits for generating a signal. A system, method and circuit for generating a signal are described. Forms of this system, me... | 06/05/2007 |
| 7224639 | Multi-phase clock signal generator and method having inherently unlimited frequency capability A delay-lock loop includes several delay lines, all but the first of which is composed of at least one variable delay unit that provides a fixed delay and a variable delay. The first delay line is composed of a plurality of fixed delay units, but no variable delay u... | 05/29/2007 |
| 7187230 | Transferred-impedance filtering in RF receivers The present invention provides a method for using transferred-impedance filtering in RF (radio frequency) receivers (e.g., inside of a mobile communication device), wherein said filtering can be done with MOS-switches transferring impedance of a regular RC or RCL ci... | 03/06/2007 |
| 7132903 | Noise-shielding, switch-controlled load circuitry for oscillators and the like A set of interconnected delay stages, such as a voltage-controlled oscillator, has switch-controlled load circuitry connected to each output of each delay stage in the oscillator ring. In one embodiment, for each delay stage output, the switch-controlled load circui... | 11/07/2006 |
| 7113116 | Sample and hold apparatus An acquisition and averaging circuit is provided in which, during a sampling phase capacitors in sample blocks 4 and 6 are sequentially connected to the input signal to sample it and are then isolated so as to hold the sample. The capacitors are then c... | 09/26/2006 |
| 7106655 | Multi-phase clock signal generator and method having inherently unlimited frequency capability A delay-lock loop includes several delay lines, all but the first of which is composed of at least one variable delay unit that provides a fixed delay and a variable delay. The first delay line is composed of a plurality of fixed delay units, but no variable delay u... | 09/12/2006 |
| 7081783 | Method and apparatus for generating and controlling a multiphase clock Multiphase clock generating apparatus includes a multiplexer selecting one of a generated clock and a gated generated clock as an M-clock in accordance with a halt multiplexer control. Divider circuitry provides an alignment signal corresponding to an inverted M-clo... | 07/25/2006 |
| 7075351 | Method and apparatus for generating a multiphase clock A multiphase clock generating apparatus includes a clock generator providing an M-clock having a frequency M times that of a received reference clock. Divider circuitry is coupled to provide an alignment signal having 1/M the frequency of the M-clock. A recovery cir... | 07/11/2006 |
| 7012420 | Measuring device to record values, in particular angles or linear segments A measuring device for the recording of values, in particular angles or linear values, includes a measured value processor and a sensor arrangement, which supplies two phase-shifted signals. Connected in series to the sensor arrangement is an adjustment unit, which ... | 03/14/2006 |
| 6998885 | Apparatus and method for delay matching of full and divided clock signals A transition delay matching circuit in which the transition delay of the divided clock signal is substantially the same as the transition delay of the reference clock signal. The transition delay of the divided clock signal is adjusted by reducing the steady state a... | 02/14/2006 |
| 6995595 | Direct conversion receiver having a DC offset eliminating function A direct conversion receiver having a DC offset eliminating function that eliminates a DC offset component in which an oscillator generates a local frequency signal, A first phase shifter shifts a phase of the local frequency signal from the oscillator by 90°, a fi... | 02/07/2006 |
| 6995593 | Circuit for programmable stepless clock shifting The present invention provides for a circuit for programmable stepless clock shifting, consisting of a splitter generating a 0° and a 90° shifted clocks from a reference clock, and an interpolator of the two shifted clocks, which provides at the output the desired... | 02/07/2006 |
| 6982584 | Phase quadrature and slaved working frequency signal generator An in phase quadrature signal generator including a phase shifter (1) that receives at an input terminal (2) an input signal (Vin) supplied to phase shifting means (3,4) formed of passive elements, arranged for delivering at first and second out... | 01/03/2006 |
| 6963236 | Method and apparatus for generating and controlling a quadrature clock Quadrature clock generating apparatus includes a multiplexer selecting one of a generated clock and a gated generated clock as a double clock in accordance with a halt multiplexer control. Divider circuitry provides an alignment signal corresponding to an inverted d... | 11/08/2005 |
| 6944437 | Electronically programmable multimode circuit An electronically programmable multimode circuit is described. More particularly, the present invention is an electronically programmable multimode circuit that includes a first path and a second path wherein a mode and a signal directional flow direction is control... | 09/13/2005 |
| 6917232 | Method and apparatus for generating a quadrature clock A quadrature dock generating apparatus includes a clock generator providing a double clock having a frequency that is twice that of a received reference clock. Divider circuitry is coupled to provide an alignment signal having half the frequency of the double clock.... | 07/12/2005 |
| 6909754 | Method and quadrature device for compensating mismatch in parallel paths by switching signals therein A quadrature device 1 for a communication device, receiver, transmitter, transceiver, telephone, mixer, modulator or demodulator comprises I and Q signal paths and corresponding signal paths components 2I, 2Q; 4I, 4Q; 9I, | 06/21/2005 |
| 6906564 | Apparatus and method for delay matching of full and divided clock signals A transition delay matching circuit in which the transition delay of the divided clock signal is substantially the same as the transition delay of the reference clock signal. The transition delay of the divided clock signal is adjusted by reducing the steady state a... | 06/14/2005 |
| 6904538 | System and method for differential data detection The present invention is directed towards a data detector for deriving a data signal from an incoming radio frequency input. The data detector comprises a delay logic which receives an unfiltered signal in quadrature and in-phase components, and applies a delay to e... | 06/07/2005 |
| 6903591 | Phase shifter circuit A phase shift circuit that generates a phase shift signal whose amplitude matches at a plurality of frequencies without increasing the circuit area. The phase shifter circuit includes first and second differential amplifiers which generate first and second first pha... | 06/07/2005 |
| 6873198 | Tunable quadrature phase shifter The present invention relates to a tunable quadrature phase shifter comprising an input (IN) for inputting an input signal (vin), splitting means (10) for splitting the input signal into two essentially orthogonal first and second signals (i1, i2 | 03/29/2005 |
| 6867656 | Self-dividing oscillators A system for generating in-phase and quadrature phase signals is provided. The system includes a first and a second differential output, such as from a sinusoidal oscillator. A first injection-locked frequency divider, such as one that uses an LC oscillator in conju... | 03/15/2005 |
| 6831497 | Active quadrature signal generator using load having low-pass and high-pass filter characteristics An active quadrature signal generator produces poly-phase quadrature signals necessary in high frequency transmit and receive elements of a communication system. The quadrature signals are produced using the phase difference between a load representing a low-pass fi... | 12/14/2004 |
| 6812763 | Automatic wideband quadrature frequency generator When two sine-wave signals in quadrature, the integral of the output is equal to zero. Conversely, when an in-phase signal is inputted as one multiplicand and the output is set to zero, a quadrature signal is derived from the second multiplicand automatically. Any a... | 11/02/2004 |
| 6768364 | Quadrature signal generation with phase error correction A quadrature signal generator includes a polyphase filter where four resistive elements and four variable capacitive elements are connected alternately in series to form a loop; and a phase corrector that variably controls the capacitance of the variable capacitive ... | 07/27/2004 |
| 6747499 | Tunable quadrature phase shifter using an all-pass circuit The present invention relates to a tunable quadrature phase shifter comprising an input (IN) for inputting an input signal (vin), splitting means (10) for splitting the input signal into two essentially orthogonal first and second signals (i1, i2 | 06/08/2004 |
| 6680639 | Phase shifting arrangement for generating mutually orthogonal signals The present invention is directed to a phase shifting arrangement for generating a set of mutually orthogonal signals. In one aspect, the invention provides a system that includes a phase shifting unit for receiving an input signal. The phase shifting uni... | 01/20/2004 |
| 6661851 | Bi-directional vector rotator A bi-directional vector rotator that can be used to provide outputs having phases that are rotated in clockwise and counter clockwise directions relative to that of the input signal. The bi-directional vector rotator includes a product term generator that... | 12/09/2003 |
| 6642634 | Vertical ramp wave generating circuit The invention includes: a capacitor 11 for generating ramp wave; a constant current source 10 for supplying constant current to the capacitor 11 for generating ramp wave; voltage fixing means for charging the capacitor 11 for generating ramp wave and for ... | 11/04/2003 |
| 6597211 | Clock divider circuit producing 0° and 90° outputs with a 50% duty cycle A clock divider circuit producing 0° and 90° outputs with a 50% duty cycle is provided. In one embodiment, the clock divider circuit may include a pair of cross-coupled circuits. The clock divider circuit may produce a first output clock signal and a se... | 07/22/2003 |
| 6580300 | Polyphase signal generator The polyphase signal generator includes a first delay circuit which adds a first predetermined phase delay to an input signal, a first phase interpolation circuit which generates a first output signal having an output phase prescribed according to a phase... | 06/17/2003 |
| 6531904 | CIRCUIT CONFIGURATIONS HAVING A DELAY DEVICE, A MULTIPLIER, FILTER AND/OR A MASTER-SLAVE FLIP-FLOP FOR GENERATING: AN OUTPUT SIGNAL BEING ORTHOGONAL TO AN INPUT SIGNAL, AN OUTPUT SIGNAL HAVING A FREQUENCY BEING DOUBLE THAT OF AN INPUT SIGNAL, OR TWO OUTPUT SIGNALS BEING ORTHOGONAL TO ONE ANOTHER A circuit configuration for generating an output signal orthogonal to an input signal includes a delay device having an input to which an input signal is applied, an output at which an output signal is available, and a control input for controlling a time... | 03/11/2003 |
