ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485408

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485409

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

ABSTRACTGeneralized expressions for switching times of a transistor employing speed-up capacitor have been derived from the charge-control equivalent circuit of the device and the effect of the duration of the‘On’pulse on switching times has been studied.During the turn-off transient of a typical switching circuit with a speed-up capacitor, the transistor turns off first but becomes conducting again for a while before finally turning off. This phenomenon known as‘wiggle effect’is undesirable in practical switching circuits. The probable cause for this phenomenon has been investigated and the effectiveness of a typical compensation circuit to minimize the wiggle effect has been studied for various types of devices like the alloy, MADT and epitaxial planar transistors.

ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485410

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

ABSTRACTLunar variation in the mid-day (10–14 hrs.) critical frequencies of the F2-layer are studied for Singapore and Baguio for the periods January 1962 to December 1963 and July 1957 to July 1959 respectively. Results are presented and discussed in the light of the earlier work, with special reference to the seasonal changes in the phase of the semi-diurnal lunar component and possible reversals of phase in the range of 20–25°mag. dip.

ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485411

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

摘要:

ABSTRACTVoltage and temperature compensation of transistor free running multi-vibrators, using both germanium and Silicon transistors has been achieved by use of Zener diodes and thermistors.For a nominal frequency of fifty, a voltage change of 50 per cent, or temperature change of 25°C., above and below room temperature, did not change the frequency beyond 0·5 cycles.

ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485412

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485413

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485415

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor

ISSN:0377-2063    

DOI:10.1080/03772063.1967.11485416

出版商:Taylor&Francis    

年代:1967

数据来源: Taylor