SU601638A1 - Arrangement for measuring scattering parameters of transistor - Google Patents

Description

From (0bnie related to the field of measurement of transistor parameters.

A device 1 for measuring a pair of microscopes for dissipating transistors is known, comprising a sinusoidal voltage generator, a divider, a measuring receiver, an indicator, a long coupler, a phase converter and an attenuator. The known device has a low measurement accuracy.

A device 2 for monitoring a microwave parameter is known in B transistors, comprising a microwave voltage generator, a voltmeter of active indications, a phase meter, resistors, and a x-tact device for connecting the transistor under study. This device although and provides high accuracy con. Trol, HAieeT low speed and e. not good 3 work.

The purpose of the present invention / is to increase the speed of measurements in a wide dia-lazone frequency.

The goal is achieved by introducing exemplary dividers into the device: on, off, controlled keys and a programmer, the generator and the reference channel of the phase meter connected to the inputs of the first and second keys, the second inputs to which are connected to the housing. of the first key is connected to the pen

voltage, the output of the first divider is connected to the input of the third key, the output of which is connected to the base of the transistor, 1 OUTPUT of the second divider is connected to the input of the fourth key, the output of which is connected to the collector of the transistor.

FIG. 1 shows a block diagram of a device for measuring the scattering parameters of transistors; in fig. 2 is a schematic diagram of one embodiment of the device.

Device E.1I: 13: measurement of the parameters of the scattering of transistors contains a generator / microwave voltage, a voltmeter 2 active blurs, a phase meter 3, the transistor 4 under study, resistors 5 and 6 to determine twice the value of the padayup; a pair of identical reference resistors 01 to 7 and 5 for determining the magnitude of the incident wave at the output of the transistor with their sequential connection with the generator and the disconnected output of the electrode of the transistor, as well as for matching the measuring circuit and the power supply of the transistor; A5; controlled keys 9–13 to transform the; serpentine curriculum; proprainiarop 14 to provide a certain order of switching keys 9-13; terminals 15 and 16 for connecting AC DC power, providing the power mode of the transistor 4.

One of the variants of the device, described in FIG. 2 includes: oneself: a first control key 9 with contacts 17, 18, 19 and a control winding 20, a second key 10 with contacts 24, 25, 26 and a control winding 27, a third key 11 with contacts 29, 30, and a winding control 3.1 for connecting the input electrode of the transistor 4 to the output of the dividers, consisting of a sample resistors 5 and b; a fourth switch 12 with contacts 32, 33 and an overcurrent winding 34 for connecting the output electrode of the transistor 4 to the output of the divider on the reference resistors 7 and 8; fifth key 13 with contacts 35, 36, 37 and control winding 38 for alternately connecting the outputs of both dividers to high-frequency connectors 39 and 40, to which the volt-meter 2 and measuring channel of phase meter 3 are connected (Fig. 1); capacitors 41 and 42; the offset to the input electrode of the transistor 4 is supplied from the / 5 terminal through a filter choke 43, an exemplary resistor 6 and the contacts 29-30 of the key 11; the power supply of the output electrode of the transistor is removed from the terminals 16 through the filter choke 44, the reference resistor tS and the contacts 32-33 of the key 12; programmer 14 based on a switch from contacts 45-5 /, 52-58 and 55-65 for controlling the switching order of electromechanical switches (relays) 9-13 by feeding 20, 27, 3.1, 34 and 38 to their control windings constant Naira + 27V, arriving from 66 and 67.

The device works as follows. When the contacts of the programmer 14 are set to positions 46-45, 53-52, and 60-59, the voltage + 27V is applied to the control windings 20 and 38 of the keys 9 and 13, which are triggered. The signal from the generator 1, through the connector 22, the contacts of the switch 9, the capacitor 21, the exemplary resistor 5 goes to the reference resistor 6. The voltmeter p 2 and the measuring channel of the phase meter 3 through the connectors 39 and 40, the contacts 35-37 of the switch 13 are connected to measure complex voltage across the resistor 6 resistor 6. As a result of this operation, the reference voltage UQI is measured, which, when the resistors 5 and b are equal, characterizes twice the magnitude of the incident wave arriving at the input of the transistor under study. When measuring the incident wave, the reference alternating current resistors are connected in series, and at the same time they are measured relative to the transistor input by alternating current in parallel. It is with parallel connection that these resistors serve as a coherent load for the input and output of the transistor or simulate the internal resistance of the generator.

- In the next position of the programmer M, contacts 47-45, 54-52 and 61-59 are closed,

a constant voltage is applied to the windings 20, 31, 34 and 38, i.e., the keys // and 12 are triggered in addition.

Power is applied to the transistor through the contacts of the keys 11 and 12. The output of transistor 4 through contacts 32-33 of switch 12 is loaded on resistors 7 and S connected to alternating current in parallel with the effect of contacts 25-26 of switch 10 and capacitor 42. Voltmeter 2 and measuring channel phase meter. 5 through contacts 35-37 of the switch.a 13 and contacts 29-30 of the switch // are connected to the input of the transistor 4, in parallel with which the exemplary resistors 5 and 6 are connected, the transistor 6 input power being supplied through the resistor 6. As a result, the complex voltage t / ii is recorded, which characterizes the algebraic sum of the incident and reflected waves at the input of the transistor under study, taking into account that both pairs of exemplary resistors at the input and output of the transistor operate in parallel.

In the third position of the programmer 14, contacts 48-45, 55-52 and 62-59 are closed, winding 38 de-energizes, key 13 is turned off. A voltmeter 2 and out, the measuring channel of the phase meter 3, through contacts 36-37 of the switch 13, are connected to the output of the transistor 4. As a result, the complex voltage C / 21 is recorded. which is a gfoporzioialno reflected wave at the output of the tr-anzistor with its direct inclusion

In the fourth position of the programmer 14, contacts 49-45, 56-52 and 63- 59 are closed, windings 20, 31 and 34 are de-energized, constant voltage is applied to winding 27, and key 10 is triggered. The signal from the generator / through the contacts 24-26 of the key 10, the capacitor 28, the exemplary resistor 7 is separated on the resistor 8, which is connected via a capacitor 42 to the case via alternating current. A voltmeter 2 with the measuring channel m of the phase meter 3 is connected via contacts 36-37 of the switch 13 with 1c for measuring the complex voltage C / 02 on the reference resistor 8, which is proportional to twice the value of the incident wave at the output of the transistor when it is turned back on.

In the fifth position of the programmer 14, contacts 50-45, 57-52 and 64-59 are closed, a constant voltage is applied to the windings 31 and 34, and keys 11 and 12 are triggered. Transient input: 4 through contacts 29-30 of key 11 It is loaded on exemplary resistors 5 and 6, connected in alternating current in parallel and performing the functions of the matching resistor. Voltmeter 2 and measuring channel of phase meter 3 through contacts 37-36 of key 13 and contacts 32-33 of key 12 are connected to the output of transistor 4. As a result, complex voltage t / 22 is recorded, which characterizes the algebraic sum of the incident and reflected waves at the output of the transistor Reverse in gtyuchenii. In the sixth position of the programmer 14, contacts 5 / -45, 53-52 and 65-59 are closed, the boom 38 is energized, and the key 13 is triggered. Voltmeter 2 and the measuring channel of the phase meter 3 are connected through contacts 55-37 of key 13 are connected to the input of transistor 4 and from1me the yut -complex voltage Oiz, which is the projection of the reflected (output) wave | At the input of the transistor when it is turned back on. At this point, the measurement of the scattering parameters of one transistor at one frequency is fixed. In the described device for direct current and alternating current power supply to the transistor, two pairs of exemplary resistors serve in the input and output electrodes, the nominal values of which in each pair are two times greater than the modulus of the corresponding vertical voltage, its input (output) resistance of the transistor. The total resistance of the circuits of model resistors is two times less than their nominal values. This fact is taken into account when calculating the F- | parameters by the known 5- parameters.

Claims (1)

Claims of Invention Steam measurement device: Meters per 2. Weinert V. Calculation of high-frequency transistor circuits using parameters 30 scatters. “Electronics, 1966, L 18, p. 26. Serial transistors containing a sinusoidal voltage generator, an effective voltmeter, a phase meter, resistors and a contact device for connecting the transistor under investigation, characterized in that, in order to increase the measurement speed over a wide frequency range, exemplary voltage dividers are introduced into it, controllable keys and programer, - the generator and the reference channel of the phase meter are connected to the inputs of the first and second keys, the second inputs of which are connected to the housing, the output of the first key is connected to the first shares By voltage, the output of the second key is connected to the second divider, the output of the first divider is connected to the input of the third key, the output of which is connected to the base of the transistor, the output of the second divider is connected to the input of the fourth key, the output of which is connected to the collector of the transistor. Sources of information taken into account in the examination: 1. Copyright certificate № 446852, “L. G01 R 31/26, 1973. R A.5 /, 5 U I-o50 il jJ7 5th otf4 o5J i U) 45 .i 44 e Zj 1G 22 five -L Phie2