【正文】 higher temperature measurements. It must be mentioned in this connection that the maximum temperature should not exceed the normal working temperature {about 500 C for Germanium transister) range of the transistor used. With Silicon transistor, however, this range may be increased appreciably. For the measurement of higher temperature, it may be necessary to reduce the supply voitage in order to cut down the collector dissipation rate of the amplifier. This instrument suffers from the mon draw back due to drift as the other type which utilises thermistor caused by the unavoidable change in the characteristic of the sensing element due to aging. Effect of this drift in the present instrument is small as the calibration curve has been found to repeat itself without any appreciable deviation. Similar instrument with some modifications, if necessary may also be utilised for the study of temperature variations with depth in oceanographic investigations. 4. Acknowledgements The author is grateful to Sri L. N. KAILASAM, Chief Geophysicist for his keen interest in the work and encouragement, and to Sri D. GUPTA SARMA, Senior Geophysicist for his helpful suggestions. REFERENCES [1] A. D. MISENER and A. E. BECK, The measurement of heat flow over land, Methods and Techniques in Geophys. 1 (1960), 10. [2] G. N. NEWS~EAD and A. E. BECk, Borehole Temperature measuring Equipment and Geothermal flux in Tasmania, Austral .J. Phys. 6 (1953), 480. [3] A. C. ANDERSON, Temperature measurement with thermistors, Electronic and Radio Engineer 35 (1958), 80. (Received 12th May 1965) 一種新型的測量地熱的半導(dǎo)體溫度計 By SATYABRATA DATTA1 摘要： 一種便攜式的呈固態(tài)的被設(shè)計和構(gòu)造成 ， 為了測量溫度變化在鉆井內(nèi)部較深的區(qū)域在如下被描述。 本科生畢業(yè)設(shè)計（論文）外文翻譯 題目： A new Semiconductor Thermometer for Geothermal Measurements 學 院： 信息科學與工程學院 專業(yè)班級： 電信 1002 班 學生姓名： 指導(dǎo)教師： 2020 年 3 月 16 日 A new Semiconductor Thermometer for Geothermal Measurements By SATYABRATA DATTA1 ) Summary :A portable solid state device designed and constructed for the measurement of temperature variation with depth inside a borehole is described. Saturation current (which is highly dependent on ambient temperature) in a reverse biased PN junction has been utilised for the purpose of measurement. The equipment is inexpensive and possesses several advantages over other types of instruments for geothermal measurement regarding simplicity in construction and operation. 1. Introduction Usually, thermistors are utilised as temperature pickup element in borehole g