Proprietary 2.4G

The transceiver chip will use external 1.9V-3.6V as the input power and internal LDOs to generate the internal supply voltages.

The receiver has a low-IF architecture and uses off-chip single-ended to differential signal conversion (via a matching network). The signal is received from the antenna and then is amplified by an LNA before being sent to RXMIXER. The in-phase and quadrature-phase outputs of the RXMIXER are then passed on to complex filters for channel selection. The output of the filters are passed on to baseband PGA and then sent to the 9bit ADCs. The final down conversion to baseband and actual image rejection are performed in the digital domain.

TX has a two-point closed-loop modulation architecture. The local oscillator contains a ΣΔ fractional-N PLL which is used to generate the phase modulated signal. The output of the RFPLL is fed into the PA driver through a LO buffer to isolate the PA and the LO.      

Proprietary 2.4G