Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – With rotor
Patent
1989-02-03
1990-08-07
Smith, Jerry
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
With rotor
307362, 307494, 371 28, G01R 3128, H03K 302
Patent
active
049471058
ABSTRACT:
A method and circuit for identifying hidden faults in the internal circuit parts of integrated CML-logic-circuits include reducing the voltage difference between the high and low binary signals (logic swing) during testing so that the noise immunity is diminished. The logic swing is reduced by varying reference voltages for constant current sources and differential amplifiers through the use of an integrated control circuit connected to influence reference voltage generators. The control circuit is activated by reducing the supply voltage in a first embodiment or, in a second embodiment, by an external control signal.
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patent: 3577073 (1971-05-01), Cray
patent: 3820077 (1974-06-01), Giebler et al.
patent: 4359653 (1982-11-01), Takamasa
patent: 4553225 (1985-11-01), Ohe
patent: 4575647 (1986-03-01), Ashton et al.
patent: 4672237 (1987-06-01), Kiyozuka
"Precise Bias Drivers for High-Speed Logic and Memory Circuits", Schon K. et al., ESSCIRC, Aug. 22-24, 1981, pp. 205-207.
Millman, J., "Microelectronics", copyright 1987, McGraw-Hill, Inc., pp. 251-261.
Rauschert Rainer
Unger Bernhard
Baker Stephen M.
Siemens Aktiengesellschaft
Smith Jerry
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