Demodulators inventions 05/06

20060103457 - System and method for providing a low power low voltage data detection circuit for rf am signals in epc0 compliant rfid tags: A system and method is disclosed for demodulating RF amplitude modulated signals in a demodulator circuit of an EPCO compliant RFID tag. One advantageous embodiment of the invention comprises first and second input ports, a +ve envelope detector circuit for each of the first and second input ports, a −ve...

20060097780 - Synchronous demodulation with precision track-and-hold circuit: A synchronous demodulation circuit uses a digitally controlled track-and-hold circuit to capture the peak amplitude of a rectified signal. A microcontroller controls the track-and-hold circuit. In particular, the microcontroller controls a hold mode of the track-and-hold circuit to capture the peak amplitude of the rectified signal....

20060097781 - Electrical circuit, apparatus and method for the demodulation of an intensity-modulated signal: A modulated optical radiation field (I) whose modulation amplitude and temporal phase depend on the local position can be detected with a plurality of pixels 1. Each pixel 1 consists of a transducing stage (T) that converts incoming light (I) into a proportional electric signal, a sampling stage (S), two...

20060091944 - I/q quadrature demodulator: An I/Q quadrature demodulator converts a frequency of a radio frequency (RF) signal, and has characteristics of low voltage and noise in a wireless communication receiver. The I/Q quadrature demodulator includes an input terminal that converts an input RF signal into a RF current signal and is shared by an...