. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. Figure o. HT+ Figure TRIANGULAR WAVE GENERATORS The most important use for triangular waves is the production of time bases for cathode ray tube displays. Both electromagnetic and electrostatic methods of cathode ray deflection are relevant to electrobiology, so we have to consider generators of triangular waves of voltage, and triangular waves of current. Triangular voltage waves The basis of all triangular voltage wave production is the charging of a capacitance by a constant
. Electronic apparatus for biological research. Electronic apparatus and appliances; Biology -- Research. Figure o. HT+ Figure TRIANGULAR WAVE GENERATORS The most important use for triangular waves is the production of time bases for cathode ray tube displays. Both electromagnetic and electrostatic methods of cathode ray deflection are relevant to electrobiology, so we have to consider generators of triangular waves of voltage, and triangular waves of current. Triangular voltage waves The basis of all triangular voltage wave production is the charging of a capacitance by a constant or nearly constant current, for then we have F = c c At the end of the charging period the capacitance is rapidly discharged, completing the waveform {Figure ). Suitable sources of constant current are the saturated diode or the pentode {Figure ). The latter method is adopted in the famous Puckle time-base generator^. The Puckle time base has certain disadvantages which render it unsuited to electrophysiological work, and it will not be discussed here. 239. 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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