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| Number | Title | Issue Date |
| 7259704 | System and method for compensating for error in a sigma delta circuit A system and method are provided for compensating for output error in a sigma delta circuit. The system includes an input for receiving an input signal and an output configured to output a output signal. The system further includes a summation component configured t... | 08/21/2007 |
| 7256623 | Frequency programmable feed-forward oscillator and triangle wave generator A frequency programmable feed forward oscillator and triangular wave generator is disclosed having a first input for receiving an input voltage and a second input for receiving an input current. Circuitry within the device responsive to the input voltage scales the ... | 08/14/2007 |
| 7256653 | High-frequency power amplifier and communication apparatus A temperature compensation circuit 145 included in a collector voltage generation section 130a applies an offset voltage Vofs(T) to a power control signal Vctrl according to a device temperature. The resulting temperature compensation circuit ou... | 08/14/2007 |
| 7253684 | Method and apparatus for reducing ripple in Class D amplifiers Class D amplifiers are used for their high efficiency, but they have some undesirable characteristics, one of these being the residual switching frequency ripple. Embodiments of the present invention comprise methods and apparatuses for reducing the switching freque... | 08/07/2007 |
| 7253683 | Method and apparatus for reducing ripple in class D amplifiers Class D amplifiers are used for their high efficiency, but they have some undesirable characteristics, one of these being the residual switching frequency ripple. Embodiments of the present invention comprise methods and apparatuses for reducing the switching freque... | 08/07/2007 |
| 7254195 | Apparatus, methods and articles of manufacture for dynamic differential delay correction The invention is directed to a system for dynamically correcting an electromagnetic wave by processing two or more aspects of the electromagnetic wave along two or more separate signal paths; comparing an expected value for at least one of the aspects of the electro... | 08/07/2007 |
| 7253625 | Precision gradient amplifier with multiple output voltage levels A controlled power supply (201, 222) drives a magnetic field gradient coil (161) of a magnetic resonance imaging apparatus (10). A gradient amplifier (201) includes a plurality of switchi... | 08/07/2007 |
| 7251462 | Modulation circuit device, modulation method and radio communication device The amplitude modulator comprises: an angle modulator for angle-modulating a phase signal to be inputted; a waveform shaping means in which, (1) when the magnitude of an amplitude signal to be inputted becomes smaller than a first prescribed value, a waveform of the... | 07/31/2007 |
| 7250816 | Method and apparatus for combining multiple signals for high efficiency applications Methods and apparatus are provided for efficiently combining and filtering a plurality of input signals into a single combined output signal. M number of input signals are received, combined and filtered by a filter/combiner. The filter/combiner has a plurality of i... | 07/31/2007 |
| 7251290 | Adaptive controller for linearization of transmitter A bank of complex gain elements is used to provide a step-wise approximation of an arbitrary complex-gain predistortion function for a nonlinear transmitter. The bank of gain elements is in an adaptive loop realizing adaptive control. The adaptive loop is closed bet... | 07/31/2007 |
| 7248649 | Digital baseband receiver including a time domain compensation module for suppressing group delay variation distortion incurred due to analog low pass filter deficiencies A digital baseband (DBB) radio frequency (RF) receiver used for receiving and processing a wireless communication signal. The DBB receiver includes a demodulator, first and second analog low pass filters (LPFs), first and second digital gain control circuits, and a ... | 07/24/2007 |
| 7248118 | Radio frequency power amplifier module A radio frequency power amplifier module that brings sufficient attenuation to a radio frequency signal in a bias supply line connecting a bias control part and a radio frequency power amplifier part without increasing module substrate area is aimed. At least one bo... | 07/24/2007 |
| 7248193 | Delta-sigma modulator and its application to switching amplification circuit A loop delay control circuit is provided between a comparator and a power switch stage. When the amplitude of an input signal is especially high, the loop delay control circuit secures an oscillation threshold value by setting a delay amount at a low value. On the o... | 07/24/2007 |
| 7248089 | Method of establishing a PWM-modulated output signal representation The invention relates to a method of establishing a PWM-modulated output signal representation (OS), providing a stream of parallelly determined intersection representations (PIR) on the basis of a stream of parallel reference signal representation (PRSR) and an inp... | 07/24/2007 |
| 7248110 | Modified doherty amplifier Systems and methods are provided for efficient amplification of a signal utilizing a modified Doherty amplifier system. A modified Doherty amplifier system includes a nonlinear main amplifier and a nonlinear auxiliary amplifier. An impedance-inverting network separa... | 07/24/2007 |
| 7248114 | Contactless IC card system In a contactless IC card system, a modulating circuit manufactured in an IC form is operable at a high power efficiency. The demodulating apparatus is configured to include: first signal output means for outputting a first output signal having a predetermined phase ... | 07/24/2007 |
| 7245100 | Multi-axis AC servo control system and method A multiple axis servo control implements a multi-tasking PWM control unit to provide PWM signals for multiple axes in a single unit. A time slice mechanism provides axis selection signals based on a system clock signal to permit control parameters of the selected ax... | 07/17/2007 |
| 7245183 | Apparatus, methods and articles of manufacture for processing an electromagnetic wave A method of processing an electromagnetic wave comprises regulating at least two independently controllable current sources with a signal determined from at least one characteristic of the electromagnetic wave to generate a processed electromagnetic wave from at lea... | 07/17/2007 |
| 7242248 | Class D amplifier A Class D amplifier receives an input signal and comprises a crossing detector and a signal generator that generates first and second periodic signals. Each period of the first periodic signal comprises first and second intervals, and each period of the second perio... | 07/10/2007 |
| 7242857 | Motor control circuit A motor control circuit includes a pulse width modulation (PWM) signal generating circuit, a driving circuit and a waveform-shaping circuit connected between the PWM signal generating circuit and the driving circuit. The PWM signal generating circuit generates a squ... | 07/10/2007 |
| 7242337 | Band-pass Δ-Σ AD modulator for AD-converting high frequency narrow-band signal with higher precision and lower power consumption A continuous-time band-pass ΔΣ AD modulator subtracts an analog signal from a DA converter from an inputted analog signal, outputs an analog signal having a subtraction result to an AD converter via a continuous-time analog band-pass filter, outputs a digital sign... | 07/10/2007 |
| 7242244 | Method and arrangement for testing a power output stage An arrangement for testing a power output stage, with the power output stage includes at least one half bridge with an upper semiconductor switch and a lower semiconductor switch connected in series and to which an operating voltage is applied. A junction point betw... | 07/10/2007 |
| 7239201 | Apparatus for controlling modulation of an alternating waveform on a DC voltage signal within a low-noise block controller An apparatus for controlling modulation of an alternating waveform on a direct current (DC) voltage signal within a low-noise block (LNB) controller is disclosed. The apparatus includes a DC power supply and a mixing/switching circuit. The DC power supply provides a... | 07/03/2007 |
| 7239200 | Power amplifying apparatus A power amplifying apparatus which is of a switching type and capable of efficiently amplifying a power of an input AC signal such as an acoustic signal, includes a first switch circuit (11) and a second switch circuit (12) to which a power supply volt... | 07/03/2007 |
| 7236060 | Electronic pulse generator and oscillator Distributed traveling wave oscillator circuitry is disclosed. The oscillator circuitry includes a signal path, a plurality of active switching means, and a direction promoting means. The signal path is formed from a pair of adjacent conductors and exhibits endless e... | 06/26/2007 |
| 7231325 | System for evaluating a sensor signal The inventive device for evaluating the sensor signal includes the provider for providing the sensor signal, the processor for processing the sensor signal and for providing an information signal comprising information regarding the amplitude course of the sensor si... | 06/12/2007 |
| 7230561 | Programmable integrating ramp generator and method of operating the same A ramp generator for an analog-to-digital converter comprises an array of capacitors each controlled by a switch responsive to one or more control signals and operable to connect/disconnect one or more of the capacitors relative to the array and a current source ope... | 06/12/2007 |
| 7230489 | System and apparatus for receiver equalization In some embodiments an apparatus includes an amplifier, a first inverter having an input coupled to an output of the amplifier, and a second inverter having an input coupled to an output of the first inverter and an output, where the output of the second inverter is... | 06/12/2007 |
| 7230500 | Synchronous delay-line amplification technique An open-loop switching amplifier achieves synchronous operation using a ring oscillator based upon a tapped delay line. A counter is clocked from the ring oscillator, periodically comparing incoming more significant data to the value of the counter to form a pulsewi... | 06/12/2007 |
| 7230485 | Three state class D amplifier A three state class D amplifier (100) comprising a first signal path (1) and a second signal path (1′) substantially identical with the first signal path (1). Each of the signal paths (1, 1′) comprises respective first and seco... | 06/12/2007 |
| 7230401 | Apparatus and method for controlling an electric motor An apparatus for controlling an electric motor provided to drive a movable object such that a detected actual amount of motion of a movable portion of the electric motor or the movable object coincides with a target amount, comprising: ... | 06/12/2007 |
| 7227731 | Apparatus for offset correcting high-side and low-side sinking/sourcing over-current protection Apparatus for providing over-current protection in a power converter device includes a first circuit for providing high-side sinking over-current protection for the power converter device responsive to a phase signal and a high-side over-current signal of the power ... | 06/05/2007 |
| 7227246 | Matching circuits on optoelectronic devices An apparatus comprises a first substrate and a second substrate. The first substrate includes an optoelectronic device and a matching circuit. The second substrate includes a driver circuit. A frequency response of the optoelectronic device is changed by the matchin... | 06/05/2007 |
| 7227408 | Low distortion class-D amplifier using sampling of a servo-loop amplifier output An electronic class-D amplifier including a pulse width modulator and a servo-loop amplifier characterized in that there is provided a sample and hold element which samples a signal at the sample input when a sample command signal is applied to a control input, and ... | 06/05/2007 |
| 7227487 | Digital saturation handling in integral noise shaping of pulse width modulation An audio amplifier includes a digital signal processor (DSP) that contains a noise shaping quantizer having an integrating error amplifier. The integrating error amplifier contains integrators connected in a feedback loop, a summer supplied with an output of each of... | 06/05/2007 |
| 7224219 | Modulator-amplifier A method and device for frequency shifting and amplifying an audio signal for use in a parametric loudspeaker system is disclosed. The method includes the operation of receiving an input audio signal and creating a reference signal. The audio signal is compared with... | 05/29/2007 |
| 7224619 | Method and apparatus for protection from over-erasing nonvolatile memory cells Charge trapping memory cells are protected from over-erasing in response to an erase command. For example, in response to an erase command, one bias arrangement is applied to program charge trapping memory cells, and another bias arrangement is applied to erase the ... | 05/29/2007 |
| 7224196 | Method and system for synchronizing phase of triangular signal A multiplicity of electronic devices is provided to generate triangular wave signals variable between an upper and lower limit voltages by charging or discharging capacitors. One of the triangular wave signals serves as a master triangular wave signal for controllin... | 05/29/2007 |
| 7224217 | Switching amplifier A switching amplifier including a PWM circuit 14, a driver 15, a switching output circuit 16 and an LPF 17 is provided with a fluctuation detection circuit 12 for detecting fluctuations in the power supply voltage. The fluctuation ... | 05/29/2007 |
| 7224218 | Pre-charge apparatus and method for controlling startup transients in a capacitively-coupled switching power stage A pre-charge apparatus and method for controlling startup transients in a capacitively-coupled switching power stage provide lower cost and improved startup transient performance in Class D amplifiers, as well as in other AC power converter applications. A charging ... | 05/29/2007 |
