Integrated circuit for communication

摘要

The present invention provides an integrated circuit for communication, e.g., for mobile radio-frequency (RF) telecommunication, including a resonator, a main amplifier, a matching circuit, a blocker detector, a mixer circuit, and a translation filter. The resonator provides conversion from single-end to differential, and filtering function for rejecting blockers at harmonics of local oscillation signal. The blocker detector detects occurrence of blocker; according to whether blocker exists, the main amplifier amplifies differential signal of the resonator by different gains, and the mixer circuit mixes amplified signal with different numbers of mixers. The translation filter contributes to rejection of blockers closed to in-band by providing a first pass band which is translated to a second pass band by the mixer circuit. The matching circuit provides impedance match.

主权项

1. An integrated circuit for communication, comprising:
a receiver terminal; a resonator electrically coupled between the receiver terminal and an internal port, capable of providing a conversion from single-end signal to differential signal, and capable of providing a filtering function; a main amplifier electrically coupled between the internal port and a high-frequency port, capable of amplifying a first signal at the internal port and accordingly providing a second signal at the high-frequency port; a blocker detector electrically coupled to the internal port, capable of detecting occurrence of blocker; a mixer circuit electrically coupled between the high-frequency port and a low-frequency port, capable of mixing the second signal with an oscillation signal; and a translation filter electrically coupled to the low-frequency port, capable of providing a first pass band at the low-frequency port; wherein the mixer circuit is further capable of translating the first pass band to a second pass band at the high-frequency port; the mixer circuit comprises a main mixer and an auxiliary mixer, and when blocker is not detected, the mixer circuit is further capable of operating in a normal mode to enable the main mixer and disable the auxiliary mixer, and when blocker is detected, the mixer circuit is further capable of operating in an OOB mode to enable both the main mixer and the auxiliary mixer.