Organic oscillator and adaptive amplifier circuits for chemical vapor sensing

B. K. Crone, A. Dodabalapur, R. Sarpeshkar, A. Gelperin, H. E. Katz, Z. Bao

Research output: Contribution to journalArticlepeer-review

207 Scopus citations


Organic transistor based circuits that can be employed for chemical vapor sensing, are described. Such circuits have improved sensing characteristics in comparison with discrete transistor based sensors. Complementary ring oscillator based sensors have a stronger response to analytes such as octanol and allyl propionate compared to a single transistor. A fabrication process that combines organic semiconductor circuitry with Si is described. The design and advantages of adaptive differential amplifiers with high gain and feedback are described. Voltage gains of ∼20 allow the detection of weak odorant inputs and the adaptive feedback allows for improved background elimination.

Original languageEnglish (US)
Pages (from-to)10140-10146
Number of pages7
JournalJournal of Applied Physics
Issue number12
StatePublished - Jun 15 2002

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


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