Stable on-resistance switch circuit
A technology of switches and sensitive resistors, which is applied in the field of signal transmission switching systems and can solve problems such as performance differences
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example 15
[0066] In Example 15, a method comprising: receiving a control voltage at a control node of a switch, adjusting the control voltage over an ambient temperature range to maintain the first and second nodes of the switch when the switch is in the on state between the specified resistance. The adjustment of the control voltage includes generating a sense voltage by adjusting the threshold voltage of the transistor, providing the sense voltage on a temperature-insensitive resistor to generate a sense current, using the sense current and a current mirror to provide a mirror current, and using the mirror current and a thermally sensitive A resistor provides the control voltage.
[0067] In Example 16, the providing the sense current of any one or more of Examples 1-15 optionally includes utilizing a polysilicon resistor.
[0068] In Example 17, the utilizing polysilicon resistors of any one or more of Examples 1-16 optionally includes utilizing P+ polysilicon resistors.
[0069] I...
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