. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. R, low out Output current Figure Magnetic time base The linearly rising current in L^ {Figure ) suggests that a circuit along the lines of the converter might be used as a time-base generator for a magnetically deflected cathode ray tube. In fact this is quite possible; the time-base circuit has the appearance of Figure , and has been used by the author for an experimental transistorized oscilloscope. The energy in the magnetic field following each growth has to be recovere
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. R, low out Output current Figure Magnetic time base The linearly rising current in L^ {Figure ) suggests that a circuit along the lines of the converter might be used as a time-base generator for a magnetically deflected cathode ray tube. In fact this is quite possible; the time-base circuit has the appearance of Figure , and has been used by the author for an experimental transistorized oscilloscope. The energy in the magnetic field following each growth has to be recovered from across Deflector coils t—nsM^ Sync ^ current Sweep amplitude. Figure the winding Lj, by the crystal diode, capacitor and load as shown. A moderately linear sweep is possible whose duration is adjusted by varying an air gap in the iron core. The difficulty is to get the flyback time Tg i^i Figure short compared with T^. On a repetitive time base T, represents 'dead' time in which events will not be drawn on the cathode ray tube face properly. It is not difficult to see that, ignoring for one moment the deflector coils, the time ratio T-^jT.^ is equal to the ratio of voltages appearing across L^„ F2/K1. For the current rise to be linear, the voltage dropped across the 703. 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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