Low-noise high efficiency bias generation circuits and method

An apparatus for generating a substantially steady state positive voltage signal (PVS) and a substantially steady state negative voltage signal (NVS) to a switching module (SM), the SM being adapted to modulate a radio frequency (RF) signal, the PVS and the NVS remaining substantially stable during a switching event of the SM, the apparatus including:

• a bias signal generation module (BSGM) for generating a substantially steady state reference voltage signal (RVS), the RVS having a voltage level nominally less than the PVS;
• a positive signal generation module (PSGM) generating the PVS, the PSGM including a first capacitor, the PSGM employing the first capacitor to nominally generate a portion of the PVS based on the RVS, the PSGM further including:
• a positive voltage charge pump signal generation module (PVCPGM), the PVCPGM generating a voltage signal (VPOS) based on a fixed internal positive voltage (VDD_INT) in correspondence of PVS, VPOS having a voltage level equal to or larger than PVS;
• and
• a PSGM differential module coupled to the PVCPGM and biased with a PSGM differential bias current driven by the RVS, the PSGM differential module controlling the PVS;
• and
• a negative signal generation module (NSGM) generating the NVS, the NSGM including a second capacitor, the NSGM employing the second capacitor to nominally generate a portion of the NVS based on the RVS, the NGSM further including:
• a negative voltage charge pump signal generation module (NVCPGM), the NVCPGM generating a voltage signal (VNEG) based on VDD_INT in correspondence of NVS, VNEG having a voltage level in magnitude equal to or larger than NVS;
• and
• a NSGM differential module coupled to the NVCPGM and biased with a NSGM differential bias current driven by the RVS, the NSGM differential module controlling the NVS.