Voltage References (V_REF) & V_REF + I_REF in one with Low Temperature Coefficient (TC): This section contains a number of CMOS ultra-low power (e.g. nano-ampere) V_REFs and V_REF + I_REF combined, having low TCs.   The V_REFs offered here are bandgap (e.g., V_REF≈V_BG≈1.2), fractional bandgap (e.g., V_REF≈V_BG/2≈0.6), and fractional (V_REF≈0.4v) and the TC can be programmed or trimmed.  The V_REF and I_REF circuits include start-up and a power-off capability as well.   V_REFs generally includes an internal buffer (BUF) to drive larger loads (e.g. Mega Ωs) in a SoC.  Some of the common traits of V_REF & I_REF circuits are summarized below.  Testing is ongoing, with specific performance metrics labeled as TBD. 

• Bandgap voltage (including fractional V_BG) and current reference cells, in standard digital CMOS, having low TC while operating in subthreshold at ultra-low current consumption I_DD
• No clock, no switch-capacitor, and no related noise or injections into substrate
• Narrow variations over process also due to V_REF and I_REFless sensitivity to V_TH
• The Intellectual Property (IP) cells here are generally portable from trailing-to-bleeding edge CMOS