| Patent Number |
Title Of Patent |
Date Issued |
| 7570118 |
Thermal overload protection circuit and method for protecting switching power amplifier circuits |
August 4, 2009 |
| A thermal overload protection circuit and method for protecting switching power amplifier circuits provides protection against latch-up and other failures due to energy returned from an inductive load when the amplifier output is disabled in response to a thermal overload condition. Upon |
| 7554409 |
Over-current protection circuit and method for protecting switching power amplifier circuits |
June 30, 2009 |
| An over-current protection circuit protection circuit and method for protecting switching power amplifier circuits provides protection against latch-up and other failures due to energy returned from an inductive load when one or more transistors in the amplifier output are disabled in |
| 7554399 |
Protection circuit and method for protecting switching power amplifier circuits during reset |
June 30, 2009 |
| A protection circuit and method for protecting switching power amplifier circuits during reset provides protection against latch-up and other failures due to energy returned from an inductive load when the amplifier is reset. Upon receipt of a reset indication, rather than immediately |
| 7432842 |
Multi-channel pulse width modulated signal interleave and inversion |
October 7, 2008 |
| A multi-channel signal processing system reduces electromagnetic interference (EMI) by staggering pulse edges of one or more pulse-width modulated signals (PWM signals) to prevent pulse edge overlap with at least one of the other PWM signals and inverting at least one of the PWM sign |
| 7327296 |
Signal processing system with modified delta sigma modulator quantizer output signals to spread |
February 5, 2008 |
| The signal processing system includes a pulse width modulator (PWM) that receives input signals from a delta sigma modulator. The PWM generates an output signal having successive frames of PWM patterns. Modifying loop filter data, such as a loop filter output signal, of the delta sigma |
| 7224218 |
Pre-charge apparatus and method for controlling startup transients in a capacitively-coupled swi |
May 29, 2007 |
| 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 source is activated |
| 7209064 |
Signal processing system with spreading of a spectrum of harmonic frequencies of a pulse width m |
April 24, 2007 |
| The signal processing system includes a pulse width modulator (PWM) that receives a quantizer output signal from a delta sigma modulator. Each quantizer output signal represents one of N quantization levels. For at least one of the quantization levels, the PWM can generate multiple, |
| 7196648 |
Non-integer decimation using cascaded intergrator-comb filter |
March 27, 2007 |
| A non-integer decimation filter for decimating an input value includes a first integrator for integrating the input value in an input sample domain at an input sample rate and for generating a first integral of the input value at its output and a second integrator for integrating the |
| 6972705 |
Signal processing system having an ADC delta-sigma modulator with single-ended input and feedbac |
December 6, 2005 |
| Signal processing systems described herein include an analog-to-digital delta sigma modulator to process a single-ended input signal using a single-ended analog feedback reference signal. The delta sigma modulator includes a switched capacitor circuit that integrates a difference between |
