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1、EIA 272 63 3234600 O063705 I JANUARY, 1963 EIA STANDARD fQr DEFINITION AND MEASUREMENT OF VOLTAGE JUMP FOR VOLTAGE REGULATOR AND REFERENCE TUBES ELECTRONIC INDUSTRIES ASSOCIATION STANDARD RS-272 I I I. Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license
2、with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 02:54:22 MDTNo reproduction or networking permitted without license from IHS -,-,- E I A 272 63 W 3234600 0063706 3 = NOTICE These standards, adopted and issued by the Electronic Industries Association, were for
3、mulated by the Electron Tube Council of the Joint Electron Device Engineering Councils. EIA engineering standards are designed to serve the public interest through eliminating mis- understandings between manufacturers and purchasers, facilitating interchangeability and improve- ment of products, and
4、 assisting the purchaser in selecting and obtaining with minimum delay the proper product for his particular need. Existence of such standards shall not in any respect preclude any member or non-member of EIA from manufacturing or selling products not conforming to such standards. Recommended standa
5、rds adopted by EIA are without any regard to whether or not their adop- tion may in any way involve patents on articles, materials, or processes. By such action, EIA does not assume any liability to any patent owner, nor does it assume any obligation whatever to parties adopting the recommended stan
6、dards. Published by ELECTRONIC INDUSTRIES ASSOCIATION Engineering Department 11 West 42nd Street, New York 36, N . Y. 0 Electronic Industries Association 1963 All righa reserved Price $.25 - - - - - - Printed in U.S.A. Copyright Electronic Components, Assemblies & Materials Association Provided by I
7、HS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 02:54:22 MDTNo reproduction or networking permitted without license from IHS -,-,- E I A 272 63 323LibOO 00b3707 5 RS-272 Page 1 DEFINITION AND MEASUREMENT OF VOLTAGE JUMP For Voltage Regulator
8、and Reference T u b e s (From Standards Proposal No. 758 formulated under the cognizance of JEDEC Committee JT-12 on Gas Tubes) 1. PURPOSE The purpose of this standard is to provide a uniform method for the measurement of voltage jump in gas voltage regulator and reference tubes. 2. COPE This standa
9、rd provides a definition of voltage jump and establishes a general test method including the necessary circuit constants. 3 . DEFINITION Voltage Jump is an abrupt change or discontinuity in tube voltage drop when the tube current is varied. 4. TEST METHOD Voltage-regulator and voltage-reference tube
10、s shall be tested for voltage jump by cycling the tube current between the specified minimum and maximum values for a minimum of one complete cycle. One complete cycle is a variation of the tube current between the specified minimum and maximum values in both the current-increasing and current-decre
11、asing directions. The variation of the tube current in any one direction shall be accomplished in not less than three seconds, nor more than thirty seconds. The current sweep may be linear, exponential, or sinusoidal. The total ambient noise level of the supply voltage and test equipment shall not b
12、e greater than 20 per cent of the maximum allowable voltage jump. Unless a specific filter is specified, the tube under test shall be coupled to the read-out device by the filter shown in the figure below. 16pf ISpf O. 15pf I / I / I o READ OUT DEVICE INPUT O K IOOK Non-electrolytic capacitors shall
13、 be used. The filter shall be terminated with a resistance of one megohm, including the input resistance of the following stage or read-out device. The read-out device shall be an oscilloscope or an equiva- lent device, capable of measuring a voltage change having a 10-microsecond rise time. Tubes s
14、hall be preheated at the maximum specified current value for a period of not less than 15 seconds unless otherwise specified, and the test shall be continued for the specified number of cycles to determine whether the voltage jump is reproducible.* “CAUTION : 1. A voltage jump may not necessarily re
15、cur at a particular current value. 2. Switching transients may occur at each end of the current sweep and should not be confused with voltage jump. Copyright Electronic Components, Assemblies & Materials Association Provided by IHS under license with ECA Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 03/30/2007 02:54:22 MDTNo reproduction or networking permitted without license from IHS -,-,-