Patent ID: 10613572

Abstract:
Systems and devices are provided for generating a process, voltage, temperature (PVT)-independent reference current for a relatively low voltage domain. An apparatus may include a bandgap circuit that outputs a bandgap voltage and a first proportion-to-absolute temperature (PTAT) current. The apparatus may also include trimming circuitry that outputs a reference a voltage based at least in part on the bandgap voltage. Further, the apparatus may include reference current generation circuitry. In particular, the reference current generation circuitry may include a complementary-to-absolute-temperature (CTAT) current generation portion that generates a CTAT current based on the reference voltage as well as a PTAT current tuning portion that tunes a received first PTAT current to generate a second PTAT current. In addition, the CTAT current generation portion may include a variation-independent reference current generation portion that generates a reference current based on the CTAT current and the second PTAT current.