Measuring and testing – Gas analysis – By vibration
Patent
1978-10-31
1980-09-02
Kreitman, Stephen A.
Measuring and testing
Gas analysis
By vibration
435807, G01N 2902
Patent
active
042200407
ABSTRACT:
A measuring ultrasonic wave transmitter comprises a negative immitance converter inserted between an ultrasonic transmitting transducer and a drive amplifier for driving the transmitting transducer. The output impedance of the drive amplifier, the damping impedance of the transmitting transducer and the impedance between the transmitting transducer and the drive amplifier are offset by the negative impedance caused by the negative immitance converter. A measuring ultrasonic wave receiver comprises a negative immitance converter inserted between a receiving transducer and a pre-amplifier for amplifying the output of the receiving transducer. The damping admittance of the receiving transducer and the load admittance of the receiving transducer are offset by the negative admittance caused by the negative immitance converter.
REFERENCES:
patent: 2416337 (1947-02-01), Mason
patent: 3468157 (1969-09-01), Burk et al.
patent: 3675472 (1972-07-01), Kay et al.
patent: 3774717 (1973-11-01), Chodorow
patent: 4119950 (1978-10-01), Redding
patent: 4156823 (1979-05-01), Suzuki
Kokuzawa Taro
Noguchi Yasuo
Suzuki Hideyuki
Yokose Toru
Flocks Karl W.
Kreitman Stephen A.
Sumitomo Bakelite Company Limited
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