VARIABLE CAPACITOR WITH PROGRAMMABILITY

摘要

Multiple variations of a variable capacitor or varactor (10) with built-in programmability; exhibiting high quality, Q, factors; manufactured in a standard CMOS process in silicon on insulator. The cell (10) is manufactured in a standard single polysilicon layer CMOS process applied to silicon on insulator (30) starting substrates. The variable capacitor cell (10) combined with a non-volatile mechanism for programming the tuning range of the varactor (10) results in a varactor (10) which can be tuned and adjusted in an on-chip and purely electronic fashion. The basic variable capacitor cell (10) comprises a floating gate MOS variable capacitor, CMOS, in series with a metal to floating gate fixed capacitor CM/FG.