This paper presents a current generator with trimmed temperature coefficient (TC) to achieve stability over a large temperature range. The proposed circuit is based on the VT-multiplier combined with a metal resistor for temperature compensation and utilizes digital resistor trimming for TC and output current calibration. The circuit has been designed at the transistor level and extensively simulated in a 180-nm BiCMOS process. Simulation results show less than 1% corner and mismatch variation of the nominal 10- μA output current and a remarkably low 11.3-ppm/°C residual temperature coefficient over the range from -40 to 135 °C.
A 11.3-ppm/°C, two temperature points trimmed current generator for precise RC oscillators
Bonizzoni E.
2019-01-01
Abstract
This paper presents a current generator with trimmed temperature coefficient (TC) to achieve stability over a large temperature range. The proposed circuit is based on the VT-multiplier combined with a metal resistor for temperature compensation and utilizes digital resistor trimming for TC and output current calibration. The circuit has been designed at the transistor level and extensively simulated in a 180-nm BiCMOS process. Simulation results show less than 1% corner and mismatch variation of the nominal 10- μA output current and a remarkably low 11.3-ppm/°C residual temperature coefficient over the range from -40 to 135 °C.File in questo prodotto:
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