Abstract: A current summing circuit includes an active cascode pair of transistors having a source-drain junction connected to a summing node to receive an input current at the source-drain junction to output an output current at a source of a transistor of the active cascode pair of transistors.

Abstract: A low output capacitance, current mode digital-to-analog converter. A low output capacitance is achieved by the use of a current mirror coupled to a plurality of digitally controlled current sources.

Abstract: A low output capacitance, current mode digital-to-analog converter. A low output capacitance is achieved by the use of a current mirror coupled to a plurality of digitally controlled current sources.

Abstract: A trimmable bandgap voltage reference circuit includes variable current sources to drive variable currents through parallel combination circuits. The parallel combination circuits include variable resistors and diodes of differing sizes. Voltages developed across the parallel combination circuits are input to a differential amplifier that is used as a feedback amplifier to bias the variable current sources. The variable current sources and variable resistors can all be digitally controlled. A processor can query the operating point of the bandgap voltage reference circuit, and can also set the current and resistance values through a control circuit.

Abstract: A comparator unit comprising a first amplifier stage and a second amplifier stage. The first amplifier stage includes a differential amplifier having a pair of input nodes for receiving a differential signal and a pair of output nodes, a switch connected across the pair of output nodes, and a non-linear load connected across the pair of output nodes. The second amplifier stage is coupled to the pair of output nodes of the first amplifier stage. In one embodiment the second amplifier stage is a non-linear amplifier. In an alternative embodiment, the differential amplifier is a differential pair. In another alternative embodiment, the differential amplifier is a pair of differential pairs.

Abstract: A trimmable bandgap voltage reference circuit includes variable current sources to drive variable currents through parallel combination circuits. The parallel combination circuits include variable resistors and diodes of differing sizes. Voltages developed across the parallel combination circuits are input to a differential amplifier that is used as a feedback amplifier to bias the variable current sources. The variable current sources and variable resistors can all be digitally controlled. A processor can query the operating point of the bandgap voltage reference circuit, and can also set the current and resistance values through a control circuit.