Notice of Violation of IEEE Publication PrinciplesA BiCMOS SiGe Direct-Conversion DBS Satellite TV Tuner with on-chip ADCs for SiP Integration with a CMOS Demodulator-on-Host

Abstract

Partitioning a DBS satellite TV receiver in a front-end RF-to-digital tuner that includes the baseband ADC converters and a digital-only demodulator-on-host resulted in a low cost and a good isolation between the analog front-end and the digital back-end, having no interface components and noise coupling issues. The two ICs were assembled together achieving a system-in-package. A direct-conversion BiCMOS tuner benefits from the low 1/f noise and high ftau bipolar transistors resulting in a lower noise figure in comparison with CMOS implementations. The on-chip LNA noise was reduced by using a noise cancellation technique that rejects the noise contribution of the input devices, eliminating the need for an external LNA. The DC offset cancellation loop capacitors were integrated on-chip by combining multiple offset loops with a Miller capacitance multiplication. The die area was significantly reduced by replacing the multi-oscillator solution used at present with a single high frequency Colpitts oscillator followed by a ratiometric frequency divider that generates the local oscillator signals for the entire satellite TV L-band.