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A tunable switched-capacitor programmable N-path tone receiver and generator

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6 Author(s)

An integrated full-duplex tone receiver and generator used for signaling in mobile radio systems and realized with a switched-capacitor pseudo N-path technique is described. A receiver filter with a quality factor programmable in the range 10-230 with an in-band loss less than 0.2 dB and center frequencies from 1 Hz up to 10 kHz was achieved. The tone generator of the system was realized with a programmable gain switched-capacitor amplifier that generates an eight-sample pseudo-sine-wave signal. The chip was fabricated using a 3-μm double-poly CMOS process. Its power consumption is 17 mW with a single 5-V supply, and its size is 18 mm2

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Solid-State Circuits, IEEE Journal of  (Volume:23 ,  Issue: 6 )