| 摘要 |
A transmission gate (200) self-biases its transistors (220, 240, 250, 260) to provide a constant gate biasing that provides a consistent path for an input signal to be cleanly passed to the gate's output (210) and protects the transistors' gate oxide in cases of high input signals. An array of matched transistors (220, 240, 250, 260) are arranged to be biased by a voltage input node (230) and with a current source (270) configured to provide a bias current across individual transistors (240, 250) of the array of matched transistors (220, 240, 250, 260). A current sink (280) is configured to sink the bias current across the individual transistors (240, 250) to set a bias voltage at a voltage input node (230) to a multiple of a gate-to-source voltage for the individual transistors (240, 250) of the array of matched transistors (220, 240, 250, 260). A different set of transistors (220, 260) is configured to provide a signal path for an analog input signal. |
