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...When G.G. Hubbard learned of his future son-in-law's invention, he called it "only a toy." His daughter was engaged to a young man named Alexander Graham Bell.
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| Number | Title | Issue Date |
| 7956699 | Frequency modulator and method for adjusting gain thereof A frequency modulator capable of performing frequency modulation without increasing quantization noise; and a method for adjusting the gain thereof are provided. An input signal is gain-adjusted by a gain adjustment section and outputted to a frequency modulation se... | 06/07/2011 |
| 7573348 | Arrangement and method for determining a gradient factor for a digitally controlled oscillator, and phase locked loop An arrangement for determining a gradient factor for a digitally controlled oscillator has a data alignment device and an identification device. The data alignment device can be supplied a modulation signal, a phase error signal and an oscillator control word. The d... | 08/11/2009 |
| 7324788 | RF integrated circuit comprising a frequency synthesizer not very sensitive to injection locking The present invention relates to an RF integrated circuit comprising a frequency synthesizer and a QAM modulator for modulating a baseband signal of frequency FBB, the frequency synthesizer supplying to the QAM modulator an output signal of frequency F... | 01/29/2008 |
| 7250823 | Direct digital synthesis (DDS) phase locked loop (PLL) frequency synthesizer and associated methods The phase locked loop (PLL) frequency synthesizer includes a phase detector receiving a reference signal, a controlled oscillator (e.g. a voltage controlled oscillator) connected to the phase detector and generating a synthesized frequency output signal based upon t... | 07/31/2007 |
| 7123666 | Gaussian minimum shift key transmitter with feedforward phase compensation A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase preemphasis coefficients for compensating the frequency conversion gain of the... | 10/17/2006 |
| 7123665 | Method and apparatus for measuring phase error of a modulated signal A method and apparatus for generating a burst FSK signal having precisely shaped transitions between modulation states. The apparatus uses feedforward compensation of phase gain and phase preemphasis coefficients for compensating the frequency conversion gain of the... | 10/17/2006 |
| 7053726 | Voltage control oscillator having modulation function There is provided a VCO having a modulation function capable of easily constituting a correction circuit which can obtain a predetermined modulation degree even when element irregularities are present. A modulation current terminal is connected to an anode side conn... | 05/30/2006 |
| 7054296 | Wireless local area network (WLAN) technology and applications including techniques of universal frequency translation Frequency translation and applications of same are described herein, including wireless local area network (WLAN) applications such as IEEE Standard 802.11 WLANs. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, ... | 05/30/2006 |
| 6621449 | Method for detection and correction of nonlinearities in radio-frequency voltage controlled oscillators A method for detection and correction of nonlinearities in radio-frequency voltage controlled oscillators provides for division of the output signal of the oscillator, direct analysis of the divided output signal by means of a counting device, conversion ... | 09/16/2003 |
| 5867536 | Digital synchronization of broadcast frequency A dynamic, self adjusting synchronization system for real time control of the frequency and bandwidth of a modulated signal includes a voltage controlled oscillator for generating a carrier signal to be modulated having a predetermined frequency and bandw... | 02/02/1999 |
| 5854811 | Circuit and method for compensating for nonlinear distortion of input signal A distortion compensating circuit comprises a frequency control section, a filtering section and an eliminating section. Major frequencies are detected from an input signal including major signals having the major frequencies by a major frequency detector... | 12/29/1998 |
| 5594757 | Method and apparatus for digital automatic frequency control A method and apparatus for digital automatic frequency control includes circuitry for frequency controlling a first information portion of a digital input signal, correlating the output with a known characteristic of the first information portion, and out... | 01/14/1997 |
| 5577074 | Combined clock recovery/frequency stabilization loop The effects of long-term drift in a local reference oscillator are compensated by dividing the local reference oscillator frequency by one of three divider patterns (nominal ratio, add a cycle, delete a cycle) so that the symbol clock of the remote termin... | 11/19/1996 |
| 5497399 | Digital FM modulating apparatus A digital FM modulating apparatus includes a device for restricting modulation data between a lower limit data value and an upper limit data value which respectively correspond to a minimum allowable frequency and a maximum allowable frequency value of an... | 03/05/1996 |
| 5399998 | Digital FM modulator An A/D converter (1) converts analog modulation signals, such as video signals and audio signals, into digital modulation signals. A center frequency data setting circuit (6) outputs center frequency data for setting the center frequency of an FM wave. An... | 03/21/1995 |
| 5289502 | Signal processing device A signal processing device for processing an information signal, comprises a frequency modulator arranged to receive the information signal, to frequency-modulate the received information signal and to output a frequency-modulated information signal, a fe... | 02/22/1994 |
| 4994766 | Frequency modulator A frequency modulator is formed in a monolithic integrated circuit as a whole. A direct current signal from a center frequency control circuit and an alternating current signal from a voltage controlled amplifier (VCA) which receives a modulation signal a... | 02/19/1991 |
| 4717892 | Current-controlled multivibrator with temperature compensation An emitter-coupled astable multivibrator capable of reducing a temperature drift of an oscillation frequency to zero is disclosed. The multivibrator includes first and second transistors, the emitters and collectors of which are cross-coupled, and which a... | 01/05/1988 |
| 3995233 | Temperature compensated variable frequency crystal oscillator A temperature compensated variable oscillator formed of at least two capacitors and a resonator, or vibrator, made of lithium tantalate, in which an inductance element whose inductance value can be varied is connected in series to the vibrator; the capaci... | 11/30/1976 |
