| 摘要 |
<p>A thermal sensor system (102) including at least one thermal sensor (104), a voltage control network (202), a current gain network (204), a current compare sensor (206), and a controller (208). The voltage control network applies reference and delta voltage levels to a thermal sensor, which develops reference and delta current signals. The current gain network is used to adjust current gain. The current compare sensor is responsive to the reference and delta current signals and provides a comparison metric (CM). The controller selects a temperature subrange and controls the current gain network to adjust the gain of the delta current signal to determine a gain differential value (G) indicative of the temperature (T). The controller may select from among different sized thermal sensors (D2, D4), current mode gain values, and control voltages corresponding with each of multiple temperature subranges. Any one or more of these parameters may be adjusted to adjust an operating point for selecting a corresponding temperature subrange.</p> |
