. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. TRANSDUCERS The tuning inductor of the oscillator in Figure has an open magnetic circuit, and is varied by the movement of a mumetal armature. The output of the oscillator is converted into square waves by the limiting valve, and •+150V 47k A7k Output. 0005 '/26J6 EF91 V26AL5 V26AL5 Figure Circuit for variable inductance transducer these square waves feed a 'pulse counter discriminator'^^ which gives a output voltage proportional to the frequency of the oscillations. Once
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. TRANSDUCERS The tuning inductor of the oscillator in Figure has an open magnetic circuit, and is varied by the movement of a mumetal armature. The output of the oscillator is converted into square waves by the limiting valve, and •+150V 47k A7k Output. 0005 '/26J6 EF91 V26AL5 V26AL5 Figure Circuit for variable inductance transducer these square waves feed a 'pulse counter discriminator'^^ which gives a output voltage proportional to the frequency of the oscillations. Once again the frequency of oscillation must be high compared with the signal frequency. Press to balance -oTIo » O+60 V 120 > .—-j^^nrm^-^Output 1-5$ 9X ?X ^u-uui f ' •—^ . I From transducer. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Donaldson, Peter Eden Kirwan. New York, Academic Press
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