IEEE 1620.1-2006 pdf free.IEEE Standard for Test Methods for the Characterization of Organic Transistor – Based Ring Oscillators.
IEEE 1620.1 describes a method for characterizing organic electronic transistor-based ring oscillators. including measurement techniques, methods of reporting data, and the testing conditions during characterization.
1.2 Purpose
The purposc of this standard is to provide a method for systematically characterizing organic transistor- based ring oscillators. This standard is intended to maximize reproducibility of published results by providing a framework for testing organic ring oscillators, whose unique properties cause measurement issues not typically encountered with inorganic-based circuitry. This standard stresses disclosure of the procedures used to measure data and extract parameters so that data quality may be easily assessed. This standard also sets guidelines for reporting data, so that information is clear and consistent throughout the research community and industry.
1.3 Electrical characterization overview
1.3.1 Testing apparatus
Testing shall be performed using an electronic device test system with an accuracy and resolution of at least ±0.1% of the measurement values thr both signal level and timing or frequency measurements. In order to maintain the necessary accuracy. this test method requires that the instrumentation be calibrated against a known and appropriate set of standards [e.g., National Institute of Standards and Technology (NIST)]. These calibrations may be performed by the equipment user or as a service by the equipment vendor. Calibration is not performed against a known organic field-effect transistor (OFET). organic circuit, or other FET-type device; the basic instrument operations (e.g.. voltage, current, and resistance) are calibrated against some method traceable to a NIST (or similar internationally recognized standards organization) physical standard. Recalibration is required according to the instrument manufacturer’s recommendations or when the instrument is moved or when the testing conditions change significantly (temperature change greater than 10 °C, relative humidity change greater than 3O%, etc.).
1.3.2 Measurement techniques Required measurements
Characterization of the organic ring oscillator shall include at minimum the following primary set of measurements:
— A ring of an odd number (at least three) of inverter stages. operated at a single supply voltage. characterizing output voltage from a single node versus time in seconds. The number of inverter stages should be chosen to be as large as practically possible. Ideally the ring oscillator should comprise at least seven or more stages. Shorter ring oscillators can often oscillate with signal level not closely related to their saturation values. While this results in faster oscillation, the timing numbers so obtained arc much less useful in understanding realistic digital circuit speeds. In addition, ring oscillators with few stages are more affected by the way in which the output voltage is measured, and, in particular, measurement results will depend more on the capacitance with which the node being measured is loaded by the measurement. For all ring oscillators particular care should he taken to report the conditions of the signal measurement at the output node. In all cases the value of the load capacitance in relation to the input capacitance of’ an mv crier stage should be reported.
Both output frequency and output signal level and swing shall be reported.
— Static measurements of inverter transfer characteristics. Preferably, the inverters for static measurements should have the same size and geometry as those used in the ring oscillator. Geometry information shall be provided for both ring oscillators and static inverters.IEEE 1620.1 pdf download.