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Inventor:
McCune, Jr.; Earl W.
Address:
Santa Clara, CA
No. of patents:
33
Patents:












Patent Number Title Of Patent Date Issued
8301088 Polar modulation transmitter with envelope modulator path switching October 30, 2012
Methods and apparatus for controlling power in a polar modulation transmitter. An exemplary polar modulation transmitter includes a radio frequency power amplifier (RF PA), a phase path having circuitry operable to generate a constant amplitude phase modulated signal, and an amplitude
8145147 Power amplifier edge evaluation-alternative envelope modulator March 27, 2012
A modulator includes a power driver, a power amplifier, and a heterojunction bipolar transistor (HBT) type device. The power driver is for receiving an amplitude modulation signal and for providing a control signal. The power amplifier is for receiving a phase modulation signal, a bi
8126409 Adaptive delay alignment in polar transmitters February 28, 2012
A polar transmitter includes a power amplifier (PA), an amplitude modulation (AM) path including an AM path adjustable delay, an AM path delay measurement circuit, a phase modulation (PM) path including a PM path adjustable delay, and a PM path delay measurement circuit. The AM path
7983643 Frequency demodulation with threshold extension July 19, 2011
A frequency demodulator comprises a frequency discriminator configured to generate a frequency modulation signal from frequency modulated signal, circuitry for generating a phase modulation signal from the frequency modulation signal, and a click reduction signal processing (CRSP) circui
7929644 Instant-acquisition clock and data recovery systems and methods for serial communications links April 19, 2011
Methods and systems for recovering clock and data in data streams communicated over serial communications links. An exemplary serial communications receiver system includes a line receiver configured to receive a data stream from a serial communications link and an instant-acquisitio
7859459 Phased array receivers and methods employing phase shifting downconverters December 28, 2010
A phased array receiver includes a plurality of receive paths having a plurality of downconverters, a plurality of digitally controlled local oscillators associated with the plurality of receive paths, and a combiner. In response to a plurality of digital phase control signals, the p
7755443 Delay-based modulation of RF communications signals July 13, 2010
An apparatus for providing an angle modulated signal includes a tunable oscillator circuit, a variable time delay circuit, and an optional scaling and delay control apparatus. The tunable oscillator circuit generates an oscillatory signal having a predetermined frequency. The variabl
7636386 Method of continuously calibrating the gain for a multi-path angle modulator December 22, 2009
A multiple path angle modulator includes a closed secondary loop added to a main control loop to automatically adjust a scaling factor related to high frequency gain. The main control loop is configured as a primary path to process the low frequency portion of the angle modulation signal
7627057 Quadrature alignment in communications receivers December 1, 2009
The present invention, takes advantage of the properties of quadrature signals to achieve precise quadrature alignment in a simple fashion. The expectation of the product of quadrature signals is zero. A phase error detection network therefore operates by multiplying the received qua
7515885 Communications signal amplifiers having independent power control and amplitude modulation April 7, 2009
The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal.
7468601 Direct phase and frequency demodulation December 23, 2008
The present invention, generally speaking, provides a time shift angle demodulator that is of simple construction and has an extended linear range. Range extension is achieved by using the input signals directly, not simply post-processing the S-PFD outputs. In accordance with one em
7444125 Communications signal amplifiers having independent power control and amplitude modulation October 28, 2008
The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal.
7424083 PLL noise smoothing using dual-modulus interleaving September 9, 2008
The present invention, generally speaking, achieves noise spreading within a PLL using a dual-modulus prescaler by interleaving the division moduli. Within a given cycle, "ones" and "tens" are not all counted consecutively. Instead, ones and tens are interleaved. In one embodiment of
7116728 Quadrature alignment in communications receivers using dual delay lines October 3, 2006
The present invention, generally speaking, takes advantage of the properties of quadrature signals to achieve precise quadrature alignment in a simple fashion. In particular, the expectation of the product of quadrature signals is zero. In accordance with the teachings of the inventi
7035604 Communications signal amplifiers having independent power control and amplitude modulation April 25, 2006
The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal.
7012984 PLL noise smoothing using dual-modulus interleaving March 14, 2006
The present invention, generally speaking, achieves noise spreading within a PLL using a dual-modulus prescaler by interleaving the division moduli. Within a given cycle, "ones" and "tens" are not all counted consecutively. Instead, ones and tens are interleaved. In one embodiment of
7010276 Communications signal amplifiers having independent power control and amplitude modulation March 7, 2006
The present invention, generally speaking, provides methods and apparatus for producing an amplitude modulated communications signal, in which a constant-envelope carrier signal is modified in response to a power control signal to produce a modified constant-envelope carrier signal.
6969984 Direct phase and frequency demodulation November 29, 2005
The present invention, generally speaking, provides a time shift angle demodulator that is of simple construction and has an extended linear range. Range extension is achieved by using the input signals directly, not simply post-processing the S-PFD outputs. In accordance with one em
6850736 Method and apparatus for reception quality indication in wireless communication February 1, 2005
An apparatus (135), method and computer program are provided for determining and indicating a quality of a signal received by a first wireless communication device (105) from a second wireless communication device (110). In one embodiment, the apparatus (135) includes a bit-error-rat
6724830 High efficiency line driver for high crest-factor signals such as DMT/ADSL signals April 20, 2004
The present invention, generally speaking, achieves a highly efficient line driver for high crest-factor signals such as DMT/ADSL signals. In an exemplary embodiment, a digital signal produced by a digital signal processor or the like is processed by a sigma-delta modulator (SDM) to
6690215 Sigma-delta-based frequency synthesis February 10, 2004
The present invention, generally speaking, satisfies the foregoing requirements using in combination within a frequency synthesis loop an SDM-based synthesizer and an SDM-based frequency digitizer. Since both blocks are SDM-based, the resulting signals can be differenced and filtered
6587018 Notch filter and method July 1, 2003
An apparatus and method are provided for attenuating an undesired frequency (f.sub.1) relative to a desired frequency (f.sub.0) in a signal transmitted from an out-put (220) of an active element (210). Generally, the apparatus includes a parallel-resonant trap (145) coupled to the ou
6323731 Variable bias control for switch mode RF amplifier November 27, 2001
The present invention, generally speaking, provides for the effective use of dynamic bias control in a switch-mode RF amplifier to achieve an output signal having wide dynamic range. In one aspect, a method is provided of amplifying an RF signal to produce a variable output signal using
6198347 Driving circuits for switch mode RF power amplifiers March 6, 2001
The present invention, generally speaking, provides an RF amplifier circuit architecture that enables high efficiency to be achieved while avoiding complicated matching networks and load networks. The active device may be of the bipolar transistor type or the FET (field effect transistor
6112071 Quadrature-free RF receiver for directly receiving angle modulated signal August 29, 2000
The present invention, generally speaking, provides a quadrature-free RF receiver for directly receiving RF signals such as angle modulated signals. Various embodiments of the receiver use a digital phase detector together with well-known RF components: a limiter, an envelope detector, a
5952895 Direct digital synthesis of precise, stable angle modulated RF signal September 14, 1999
The present invention, generally speaking, provides an RF modulator that allows precise, stable phase shifts to be obtained. The modulator uses a PLL structure including an auxiliary feedforward path used to inject a baseband modulation signal into the PLL at a point past a loop filter o
5731773 Half-order hold direct digital frequency synthesis March 24, 1998
A direct digital frequency synthesizer is provided that solves the problems of spurious spectra and spectral enveloping. The output of the D/A converter is gated such that a signal to be filtered is connected to circuit ground during an initial noisy portion of the D/A conversion cycle
5675292 Phase lock loop enabling smooth loop bandwidth switching over a wide range October 7, 1997
A PLL that enables smooth switching of loop bandwidth over a wide range. By switchably inserting a resistance between the output of a current-mode charge pump and a loop filter of the PLL, current sources of the charge pump are made to appear as voltage sources, and a suitably small tric
5491458 Apparatus for spreading the spectrum of a signal and method therefor February 13, 1996
An oscillator generates a signal that is applied to one input of a phase shifter circuit. The other input of the phase shifter is connected to a source of a phase modulation signal. In response to the phase modulationsignal, the phase shifter provides a clock signal with a spread spe
5321799 Signalling transition control in a modulated-signal communications system June 14, 1994
A signal transition control system for use in a modulated-signal communication system having a plurality of predefined signal states each representing a digital data symbol, enables a transition from one signal state to a next signal state to be executed in a smooth, bandwidth-effici
5247469 Digital frequency synthesizer and method with vernier interpolation September 21, 1993
Digital frequency synthesizer and method in which an output signal of desired frequency is synthesized by periodically incrementing a count in steps corresponding to a desired output frequency, monitoring the count to determine when it reaches a level corresponding to a point at which a
5053982 Variable modulus digital synthesizer October 1, 1991
A synthesizer capable of generating a multiplicity of output frequency signals with 1 hertz resolution utilizing binary mathematics in a binary circuit. The apparatus includes providing to an accumulator a stable reference input signal having a frequency value of K, a defined value of
4746880 Number controlled modulated oscillator May 24, 1988
Disclosed is a number controlled, modulated, oscillator employing a modulation selector for receiving a digital number for use for frequency modulation or for phase modulation, a tuning network for receiving another digital number in a variety of forms, and a frequency modulator for addi










 
 
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