Terax Communication Technologies Inc.

Jinn-Ja Chang

Jen-Sheng Huang

Zheng-Liang Lin

Yaw-Guang Chang

Li-Cheng Hsu

Dung-Yun Chen

A method of updating firmware using the object push profile in the bluetooth object exchange protocol is proposed. This method first makes use of a bluetooth transmitter to connect a bluetooth electronic device whose firmware is to be updated and a host storing a new program code. Next, the bluetooth transmitter checks parameters in an EEPROM of the bluetooth electronic device to determine whether it is necessary to update the firmware. Through the object push profile (OPP) in the object exchange (OBEX) protocol of the bluetooth technology, this new program code is reprogrammed to a flash memory in the bluetooth electronic device. After the end of the reprogramming action, the bluetooth connection between the bluetooth electronic device and the host is cut off to finish firmware update of the bluetooth electronic device.

Method of updating firmware using object push profile in the bluetooth object exchange protocol

A wireless transmitter is proposed. First, a ROM having a lookup table therein is provided. The lookup table is used to store a plurality of IF modulation signals so that a state machine can select a corresponding IF modulation signal from the lookup table of the ROM according to loaded data and output a digital IF modulation signal to a DAC, which then converts the digital IF modulation signal into an analog IF modulation signal to be filtered by a low pass filter. Finally, a local oscillator is utilized to modulate the filtered analog IF modulation signal to an emission frequency, hence obtaining an RF signal. The transmitter makes use of a time-sharing way to use a local oscillator together with the receiver. Complexity of device can thus be simplified to meet the requirement of compactness of wireless products.

Wireless transmitter

There is provided a signal demodulating method of a two-phase frequency shift keying (FSK) digital demodulator. The method utilizes at least a detect circuit respectively detecting and collecting a positive edge signal and a negative edge signal of an intermediate frequency signal. Then, two n-bit ripple counters are utilized to refer to a threshold value and then receiving the positive and negative edge signal as a switch signal to reset the threshold value as an initial value of counters so as to start to count and compare to output a positive edge data bit and a negative edge data bit. Last, a hard decision logic circuit is used to perform a frequency-descending decision in accordance with the positive and negative edge data bit so as to send a base frequency signal. The method can decrease the logic gate counts, shorten the signal delay time, and increase the resolution of the demodulation. The present invention allows for; easy and practical signal demodulating method results, which can match the compact trend of the wireless products.

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Hsinchu, Taiwan

Jinn-Ja Chang