On-chip tunable wide ranged multiple output voltage reference

Abstract

We presents an on-chip tunable wide ranged multiple output CMOS voltage reference based on non-volatile highly precise field programmable floating gate transistors. The reference is outfit for both sub 1V and above 1V applications. The circuit design consists of basic beta multiplier configuration and offers a strategy of making the current sourcing circuit and reference generating circuit as independent units. A simulation model of the circuit was built in T-Spice, 0.35µm CMOS process. Simulation results show high amount of temperature insensitivity for a large range of thermal conditions. The reference voltage variation is about 1.65mV/°C to 1.67mV/°C over wide temperature range of -40 to 140°C; has an impressive static supply dependency of 125µV/V for a reference of 280mV. The circuit can also be operated at very low supply voltage (0.5v).

A Calibration Technique for DVMC with Delay Time Controllable Inverter

“…In contrast that in the proposed DVMC with M delay elements is 26M + 54K + 78 which includes 26 transistors for bias voltage generators; we used the voltage generator shown in Ref. [18]. So, it is conclude that the proposed DVMC requires 114 more transistors than the traditional DVMC.…”

“…[17] was used; the clock period can be set every 5.2 ps from 500 ps to 1,000 ps. We used an on-chip tunable wide ranged multiple output voltage reference circuit [18] to generate the bias voltage of V biasp and V biasn for the DTC inverter; the generator of Ref. [18] can generate bias voltages with 13-bit resolution [19].…”

“…We used an on-chip tunable wide ranged multiple output voltage reference circuit [18] to generate the bias voltage of V biasp and V biasn for the DTC inverter; the generator of Ref. [18] can generate bias voltages with 13-bit resolution [19]. In the calibration of the DTC inverter, the maximal value N is 16.…”

“…The voltages shown in the Tables can be generated by using a voltage generator with 6-bit resolution or higher, which the voltage generator of Ref. [18] meets with a large margin. In summary, the comparison shown in Table 1 is valid even when considering practical voltage generator.…”