The Mathematical Model of Radio-measuring Frequency Transducer of Optical Radiation Based on MOS Transistor Structures with Negative Differential Resistance

Abstract

The article deals with results of theoretical and experimental studies of a radio-measuring frequency transducer of optical radiation based on MOS transistor structures with negative differential resistance and an active inductive element. Analytical expressions of the transfer function and sensitivity equations are obtained on the basis of the solution of a system of non-linear equations. Experimental studies of the current-voltage dependences of the proposed transistor structure of the frequency converter of optical radiation in static and dynamic modes confirm the presence of a section with negative differential resistance on the I-V characteristic, which compensates for the losses in the oscillatory circuit. The theoretical and experimental dependences of the frequency of generation on the power of optical radiation are presented. The dependence of sensitivity of the developed transducer on the power of optical radiation varies from 9.7 kHz/μW/cm 2 to 24.5 kHz/μW/cm 2 . A mathematical model of the thermal conditions of a radio-measuring frequency transducer of optical radiation has been developed. The calculation of non-stationary thermal conditions of the frequency transducer allowed to obtain the temperature field of the transducer integrated circuit. The time to achieve the steady state does not exceed 5.8•10 -4 s. Moreover, the maximum temperature of overheating for the elements of the integrated circuit of the transducer does not exceed 2.49 C.

Self-oscillating parametric optical transducer based on quantum double-barrier heterostructure

“…The use of quantum heterostructures as optical transducers based on tunnel-resonant diodes makes it possible to obtain negative differential resistance and ultra-high-frequency properties of these devices 9,10,11 . These properties of tunnel-resonant diodes are the basis for the development of a new class of optical transducers that work in the "optical power-frequency" conversion mode, which makes it possible to significantly improve their metrological performance 12 .…”

“…On the other hand, the value ekv C can be determined from the formula of the resonant frequency of the self-oscillating based on the tunnel-resonant diode, which has the form [12] 2 0 2 11 2…”

Self-Oscillating Parametric Humidity Sensor With Frequency Output Signal

“…The use of modern microelectronic technologies contributes to the development and manufacture of microelectronic humidity sensors with high accuracy and sensitivity to the measuring parameter and insensitive to other external factors, small weight and size, and low power consumption [1,8,12,13]. It should be noted that the existing analog measuring transducers have a number of disadvantages, which include a small output signal, significant measurement errors, as well as low sensor output signal powers, which leads to low noise immunity and low speed [15][16][17][18][19].…”

Mathematical model of a frequency pressure transducer based on a resonant tunneling diode

“…The frequency principle of operation of pressure sensors has several advantages: high measurement accuracy; high noise immunity; the simplicity of design; no influence of measuring channels on each other; the ability to transmit measurement information over a distance without wired communication; no need to use analog-to-digital converters during the subsequent processing of information signals; the ability to create "intelligent" pressure sensors. These advantages are good reason to carry out extensive studies of the properties of tunneling resonant diodes not only as pressure sensors, but also as generators, switches, logic elements, resonant amplifiers, memory devices, and others [4][5][6]. However, regarding pressure sensors based on resonant tunnel diodes, a mathematical model that describes the analytical dependences of all elements of the equivalent circuit on pressure has not yet been fully developed.…”