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On chip noise tolerant temperature sensing circuit

  • US 5,213,416 A
  • Filed: 12/13/1991
  • Issued: 05/25/1993
  • Est. Priority Date: 12/13/1991
  • Status: Expired due to Fees
First Claim
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1. An on-chip temperature sensing circuit for semiconductor devices, comprising:

  • a differential voltage source (DVS) having first and second branches,each of said branches having thermal sensitive transistor means therein connected in series with a current source,said thermal sensitive transistor means in said first and second branches comprising a base-collector transistor in said first branch of said DVS and a base-emitter transistor in said second branch of said DVS having different voltage output rates of change with temperature at their branch output nodes,amplifier means coupled to the output nodes of said first and second branches of said DVS,means for generating an on-chip voltage signal at an output electrode of said chip which is tolerant to switching noise and provides a voltage signal indicative of the temperature of said chip.

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