论文信息 - AMPLIFIER IMPERFECTION EFFECTS IN SWITCHED-CAPACITOR RESONATORS

AMPLIFIER IMPERFECTION EFFECTS IN SWITCHED-CAPACITOR RESONATORS

A switched-capacitor bandpass analog-to-digital-converter is one of the circuit blocks used in wireless communication systems to digitize the received analog signal at certain center frequency ( ). This particular converter is used especially for digital FM or AM radio applications and most of the portable communication devices such as cellular-phones. The main block of this converter is the resonator, which resonates at this center frequency. Two of the main design criteria of the resonators are; to have very high quality resonance peak and to locate the center frequency accurately without any shift. However, because of the circuit imperfections, the resonance peak gain and the center frequency have degraded in the previous well-known architectures, seriously.

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