| 摘要 |
<p>Switches with improved biasing and having better isolation and reliability are described. In an exemplary design, a switch (50D) is implemented with a set of transistors (510a-k), a set of resistors (520a-k), and an additional resistor (530). The set of transistors (510a-k) is coupled in a stacked configuration, receives an input signal (Vout), and provides an output signal. The set of resistors (520a-k) is coupled to the gates of the set of transistors (510a-k). The additional resistor (530) is coupled to the set of resistors (520a-k) and receives a control signal (vcontrol) for the set of transistors (510a-k). The resistors reduce signal loss through parasitic capacitances of the transistors when they are turned on. The resistors also help split the signal swing of the input signal approximately evenly across the transistors when they are turned off, which may improve reliability of the transistors. The switch (50D) may be used in a switchplexer, a power amplifier (PA) module, etc.</p> |
