Abstract: A monolithic voltage reference circuit may include a voltage-mode band-gap reference circuit, a temperature independent differential current source, and a temperature dependent differential current source. The voltage-mode band-gap reference circuit may include an error amplifier having differential input nodes. The temperature independent differential current source may be configured to add in or subtract from the differential input nodes a substantially temperature independent differential current with an allocation between the nodes that is controlled by a selectable output voltage trim setting. The temperature dependent differential current source may be configured to add in or subtract from the differential input nodes a substantially temperature dependent differential current with an allocation between the nodes that is controlled by a selectable temperature drift trim setting.

Abstract: The most significant portion of a digital word may be converted into a high and a low analog voltage representative, respectively, of the highest and lowest possible values which a digital word could have with the most significant portion. An analog output may be produced by interpolating between the high and the low analog voltage in accordance with the value of the least significant portion of the digital word. A differential transconductance input stage may have pairs of differential input transistors. For each differential input transistor pair, a separate bias current circuit may provide a bias current to the differential input transistor pair, separate from the bias current provided to the other differential input transistor pairs. All bias current circuits may be identical in a linear interpolator. The transconductance input stage may have a gain of at least 20 dB and may result in an integral non-linearity in the analog output of no more than 0.