Low-noise high efficiency bias generation circuits and method
View Patent ↗Embodiments of signal bias generators and regulators are described generally herein. Other embodiments may be described and claimed.
1. 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 PVS and the NVS remaining substantially stable during a switching event of the SM, 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; 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.
2. The apparatus of claim 1 , wherein the SM modulates a radio frequency (RF) signal.
3. The apparatus of claim 1 , the PSGM generating a positive capacitor control signal (PCCS) based at least partially on the RVS and employing the first capacitor to nominally generate a portion of the PVS at least partially based on the PCCS.
4. The apparatus of claim 1 , the NSGM generating a negative capacitor control signal (NCCS) based at least partially on the RVS and employing the second capacitor to nominally generate a portion of the NVS at least partially based on the NCCS.
5. The apparatus of claim 1 , the BSGM employing a first FET element and a second FET element formed on a common silicon on insulator (SOI) wafer in part to generate the RVS where the RVS is temperature independent.
6. The apparatus of claim 3 , wherein the ratio of the PVS voltage magnitude to the RVS voltage magnitude is about 1.5 to 4.
7. A method of generating a substantially steady state positive voltage signal (PVS) and a substantially steady state negative voltage signal (NVS) to a switching module (SM), the PVS and the NVS remaining substantially stable during a switching event of the SM, including:
generating a substantially steady state reference voltage signal (RVS), the RVS having a voltage level nominally less than the PVS;
employing a first capacitor to nominally generate a portion of the PVS based on the RVS; and
employing a second capacitor to nominally generate a portion of the NVS based on the RVS.
8. The method of claim 7 , wherein the SM modulates a radio frequency (RF) signal.
9. The method of claim 7 , further including generating a positive capacitor control signal (PCCS) based at least partially on the RVS and employing the first capacitor to nominally generate a portion of the PVS at least partially based on the PCCS.
10. The method of claim 9 , further including generating a negative capacitor control signal (NCCS) based at least partially on the RVS and employing the second capacitor to nominally generate a portion of the NVS at least partially based on the NCCS.
11. The method of claim 9 , wherein the ratio of the PVS voltage magnitude to the RVS voltage magnitude is about 1.5 to 4.
12. The method of claim 11 , wherein the ratio of the NVS voltage magnitude to the RVS voltage magnitude is about 1.5 to 4.