Electronic apparatus for biological research Electronic apparatus for biological research . electronicappara00dona Year: 1958 SOFT VALVES and the ballast resistance is 210 V/17 mA = 12,350 ohms for a Fâ of 510 V. The forward stabiUzation ratio will be 250 50 250 + 12,350 and the variation in output voltage between 0 and 100 per cent full load will be 7 mA X 250 ohms = 1-75 V. Clearly both backward and forward stabi- lization are much improved by reducing the maximum current demands on the device. Difference diode In the design of voltage reference and voltage stabihzer tubes every effort is m
Electronic apparatus for biological research Electronic apparatus for biological research . electronicappara00dona Year: 1958 SOFT VALVES and the ballast resistance is 210 V/17 mA = 12,350 ohms for a Fâ of 510 V. The forward stabiUzation ratio will be 250 50 250 + 12,350 and the variation in output voltage between 0 and 100 per cent full load will be 7 mA X 250 ohms = 1-75 V. Clearly both backward and forward stabi- lization are much improved by reducing the maximum current demands on the device. Difference diode In the design of voltage reference and voltage stabihzer tubes every effort is made to make the striking voltage as little above the running voltage as possible, as this facilitates the design of the ancillary circuit, as we have seen. In the difference diode, on the other hand, the striking voltage and running voltage are deliberately made widely different. This property can be made use of in various ways, of which two will be mentioned. Bistable circuitâA bi-stable circuit is one which has two distinct stable conditions and may be altered from one to the other by appropriate electrical pulses. The difference diode bi-stable circuit is extremely simple and appears in Figure and b. Its two states are simply 'aglow' and 'not aglow'. /, â ^ ^ V^Vi -It-pulses II n '°'' -I Lpulses
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