Voltage generator, switch and data converter circuits

摘要

A data converter can include a resistor network, a switch network connected to the resistor network and having a plurality of switch circuits, each with an NMOS and a PMOS switch transistor, and a voltage generator to generate a drive voltage for driving a gate of at least one of the NMOS or PMOS switch transistors of at least one of the switch circuits. The voltage generator can include first and second pairs of transistors, each pair having connected control terminals and being connected to a second NMOS or PMOS transistor, a first or second resistor, and the other pair of transistors. The first and second resistors can have substantially equal resistance values. A ratio of width-to-length ratios of the second NMOS to PMOS transistors can be substantially equal to such a ratio of the switch circuit NMOS to PMOS transistors.

主权项

1. A digital-to-analog converter circuit, comprising:
a resistor network including a plurality of interconnected resistors; a switch network connected to the resistor network, the switch network including a plurality of switch circuits, each having an NMOS and a PMOS switch transistor; and a voltage generator to generate a drive voltage at an output terminal for driving a gate of at least one of the NMOS or PMOS switch transistors of at least one of the switch circuits, the voltage generator including:
a first pair of bipolar transistors, having connected bases and being connected to a second NMOS transistor and a first resistor; anda second pair of bipolar transistors, having connected bases and being connected to a second PMOS transistor, a second resistor and the first pair of transistors.