Freescale Semiconductor,inc.

Nxp Usa, Inc.

SHixiang Nie

Zhihong Cheng

Zhijun Chen

Zhiling Sui

A frequency shift keying (FSK) demodulation component having of a sampler that receives an FSK modulated signal, samples the received FSK modulated signal, and outputs the sampled signal. The FSK demodulation component further includes a low pass filter that filters the sampled signal, and a frequency shift detector that detects shifts in frequency of the low pass filtered sampled signal. The FSK demodulation component then outputs an indication of the detection of shifts in frequency of the low pass filtered sampled signal.

Wireless charger using frequency aliasing FSK demodulation

A processor with programmable virtual ports includes a plurality of in/out (IO) pins for transmitting and receiving data. The IO pins are grouped into a plurality of predefined ports, each of which has a physical address stored in one of a memory location of a memory map. The IO pins may be remapped to one or more virtual ports.

Processor with programmable virtual ports

A stepper motor controller includes control circuitry with control outputs and individual driver pulse width modulation (PWM) circuitry with individual driver PWM outputs and modulation control inputs coupled to the control outputs. There is a group of individual drivers, each one having an input coupled to one of the PWM outputs, and an output coupled to an individual driver terminal of the controller. There is common driver PWM circuitry having a common driver PWM output. A common driver having a common driver input is coupled to the common driver PWM output and a common driver output is coupled to a common driver terminal of the controller. When a coil is connected between respective driver terminals and the common driver terminal, individual PWM driver currents are supplied to the coils from the individual driver terminals and a common PWM driver current is supplied to the coils from the common driver terminal.

Growing community of inventors

Suzhou, China

SHixiang Nie