SU1649474A1 - Ic parameters tester - Google Patents

Abstract

The invention relates to a measurement technique, namely, devices for automatically controlling the parameters of integrated voltage regulators. The purpose of the invention is to improve the accuracy of control and speed of the device due to the possibility of converting small increments of the output informative parameter into a convenient form for measurement, which is achieved in that the device additionally contains a block of time intervals and a voltage converter as described in the description of the invention. The device also contains a measuring unit, a mode setting unit, a digital control unit, an output voltage regulator, a comparator, a switching unit, and a lemma for connecting the findings of the test object with the appropriate connections. 5 il. W Ё

Description

The invention relates to a measurement technique, namely, devices for automatically controlling the parameters of integrated voltage regulators.

The purpose of the invention is to improve the accuracy of control and speed due to the possibility of converting small increments of the output informative parameter into a form convenient for measurement.

FIG. 1 shows a block diagram of the device; in fig. 2 is a block diagram of a time interval block; in FIG. 3 is a voltage transducer block diagram; in fig. 4-5 - time diagrams.

The device for automatic control of the parameters of integrated circuits (see Fig. 1) contains a measuring unit 1, a mode setting unit 2, a time interval unit 3, a voltage converter 4, 1 output voltage controller 5, a digital control unit 6, a comparator 7, switching unit 8 and terminals 9 for connecting the terminals of the test object with corresponding connections,

The block 3 of time intervals (see FIG. 2) contains a matching circuit 10, a ready signal generator 11, a gate decoder 12, a data register 13, an address and selection register 14, a write gate driver 15, an address decoder 16, a timer selector 17, a circuit 18 start timing, clock generator 19, integral timers 20-23, a group of data and control inputs 24, outputs with corresponding links.

The voltage converter 4 comprises (see Fig. 3) an extraction amplifier 30 made at the first operational amplifier 31 with a resistor 32 in the feedback circuit and an adder 33, a storage capacitor 34. a compensation capacitor 35, the first control switch 36, common

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Yu

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2

37, charging resistor 38, input voltage divider 39, second controlled switch 40, voltage divider on resistors 41, 42, repeater 43 on the second operational amplifier, autocorrection capacitor 44, third controlled switch 45. scaling amplifier 46, made on the third operational amplifier 47 and registers 48, 49, the measurement start circuit 50, the sample and hold circuit 51, the inputs 52, 53, and the outputs 54, 55 with corresponding connections.

The device monitors the following types of integral voltage regulators (ISN):

- unipolar with a fixed-output voltage;

- unipolar with adjustable output voltage;

-dipolar with fixed output voltage.

For each of these types of PSIs, the following parameters can be monitored:

- output voltage Uvih;

instability due to Ki;

- current instability Ku;

-current loss In.

For SRI with an adjustable output voltage, the control of the listed parameters is possible at any predetermined output voltage.

Device for automatic control of the parameters of integrated circuits works as follows.

Control output voltage and output.

Measuring unit 1 through the circuit Output 1 sets the value of the positive polarity voltage mode generated by the unit 2 (see Fig. 1). By synchronizing signal 1pr. 1, this voltage is fed through the switching unit 8 and the terminals 9 to the outputs of the controlled ISC (not shown in Fig. 1).

Through the circuit Output 3, unit 1 sets the voltage value, according to which unit 2 sets the required load current. On the tnp sync signal. 3, this load current is set at the output of the controlled PSI. At the same time, the voltage from the output of the monitored voltage source through the terminals 9 and block 8 is fed through the Hx circuit to the measuring unit 1. where it is measured and compared with the tolerance value.

When monitoring the output voltage, there are no restrictions on temporal relationships; therefore, the synchronizing signals Inp. 1, and Inp. 3 are produced by measuring unit 1.

Control of instability on the voltage Ki.

Unit 1 exposes the mode setting to bus 2 via Input 1 and Input 3 information, which determines the magnitude of the generated voltage and current, and via Bus Input 5, information about the value of the second component of the stepped voltage.

When monitoring the specified parameter, it is necessary to tightly link in time between the generated signals and the meter. In addition, there is a time limit for the formation of the second component of step voltage.

The time control chart is not valid.

the voltage at Ki is shown in FIG. four.

The provision of the required time ratios is accomplished by a block of 3 time intervals by generating Inp synchronization signals. 1, Inp. 3 and Inp. 5 and Starting I. The duration and the beginning of the formation of the synchronization signals can be changed and is set by block 1 on the data circuits (DAOO-06H) and control (SPAK 4; DM VU). Programming the minimum required duration provides improved speed

devices with high precision control. The block of 3 time intervals works in two stages.

The first stage - programming - is carried out on data chains (DAOO-06N)

and management (SPAK 4; CD VU).

First, one of the integral timers 20-23 is addressed. The information on the DAOO-06H circuits is recorded in the address and selection register 14, decrypted by the select decoder 17, at the output of which one of the signals BM1 + VM4 appears.

Then, one of the internal timers of the selected integral timer is addressed.

Each counter is initialized by entering the control word through the address and selection register 14 and the address decoder 16. Along with the number of the counter, this word specifies the recording or reading of the contents, the mode of operation, and also indicates the number system (binary or binary-decimal).

Following the control word to the selected counter through the data register 13

the chains of PO-P7 record its initial content. Recording of information is carried out with the help of Strobe G, Strobe 2 and Strobe 3 gates. The 12 gates formed by the decoder and the recording strobe 15 are generated by the decoder.

For synchronous operation with the measuring unit 1 at the programming stage through the coincidence circuit 10 and the readiness signal generator 11, the signal pgp 4 is output at the output 25 of the unit 3.

The second stage is the issuance of Inp control signals. 1, Inp. 3. Inp. 5 and Start G.

The operation of the timers 20-23 is performed on the clock pulses To, generated by the clock generator 19.

The launch is carried out by the trigger signal P generated by the trigger synchronization circuit 18. To maintain high measurement accuracy, the synchronization of the circuit 18 is performed by the frequency of the network.

 The monitoring starts upon the arrival of the last byte of information in block 3 (time ti in FIG. 4). Unit 3 generates signals (al. 1 and 1dp. 3), according to which the required test voltages and currents are applied to the terminals of the controlled power supply.

After the time recorded earlier in block 3 time intervals, the latter generates a signal 1пр.5 (time ТЗ in Fig. 4), over which in block 2 the voltages are summed, the values of which are set along the chains Input 1 and Input 5.

After the time recorded earlier in block 3, the signals Inp are removed. 5 (time t4 in FIG. 4) and Inp. G, 1pr. 3 (time ts in fig. 4). As a result, the device forms an input action, which is fed through terminals 9 to the inputs of a controlled voltage supply in the form of stepwise voltage.

At the output of the controlled ICV, an output voltage appears, determined by the parameters of the ICI. At the moment when the destabilizing effect at the output of the SIV is fed to the INS input, the voltage changes by U (see Fig. 4). This voltage is through the terminals 9 and the switching unit 8 through the circuit Input L enters the voltage converter 4 (see Fig.1).

Voltage converter 4 performs the selection of small increments of the output voltage of the controlled PSI against the background of a relatively large absolute value of the output voltage and converts with high precision small increments into a voltage suitable for measurement. This makes it possible to increase the accuracy of control of integrated voltage stabilizers.

Converter 4 operates as follows.

0

0

with

0

five

0 5

0 5

Until the moment of time ta (see FIG. 4), the key. 40 is connected to the common bus 37. The capacitor 34 is charged to the voltage 1) O.

Since the non-inverting input of the amplifier 31 is also connected to the common bus 37 via a switch 40, a zero voltage must be present at its output. In real operational amplifiers, a small parasitic voltage is always present at the output. To compensate for this voltage in order to achieve a high conversion accuracy, a compensation circuit is applied. In the case when the output voltage of the amplifier 31 is not zero, the operational amplifier 47 through the closed switch 45 charges the auto-correction capacitor 44 to a voltage at which the output voltage of the repeater 43 through the divider resistors 41 and 42 and the adder 33 applied to the inverter the input of the amplifier 31. compensates for the absence of zero voltage at its output. Thus, at the output of the real amplifier 31, a zero level is maintained.

At the moment of time ta, immediately preceding the supply of the unstabilizing voltage to the controlled SRI and set by block 3, the Start signal 1 arrives at the input 53 of the converter. On this signal, the measurement start circuit 50 generates an On signal. 1, disconnecting the contacts of the keys 36,40,45, preparing the converter for measurement.

The voltage on the capacitor 44 during the measurement time does not change, due to the very small input current of the repeater 43 and the constant discharge time, a much longer measurement time. In order to ensure high accuracy of the selection of small voltage increments, it is necessary to take into account even a small change in the voltage on the capacitor 34 due to its self-discharge and discharge through the high-resistance input of the amplifier 31. To compensate for the self-discharge and discharge of the capacitor 34, a circuit in which The capacitor 35, and the discharge rate is chosen by the resistor 38 so as to compensate for the specified p.

At the moment in time ta, the voltage 11out + AU from the output of the controlled supply voltage in response to the destabilizing input action arrives at the converter input 52. Thus, on the left (according to the scheme of FIG. 3) plate of the capacitor 34, the voltage becomes equal to + Au. and on the right is AU. The voltage A U, isolated and amplified by the amplifier 31, comes from its output to

input circuit 51 sample and store. Upon completion of the transient processes, the measurement start circuit 50 generates an on signal. 2 at time t on 2 (see FIG. 4). Sample and hold circuit 51 goes into storage mode for a time sufficient to measure the voltage increment, previously isolated and amplified, with a slow-acting meter. The voltage from the output 55 of the converter 4 is fed through the circuit Output D to the switching unit 8 for further measurement by the measuring unit 1 according to the Start signal U formed by the circuit 50 (see Fig. 3). Measuring unit 1 measures the voltage received and converts it into an amount of voltage instability Ki. Control of current instability Ku. The processes of setting the effects on the controlled INS and the measurements are similar to those described above when measuring the instability under the voltage Ki.

The difference is that when measuring the voltage Q, the voltage applied from the output of the mode setting unit 2 through the switching unit 8 and the terminal 9 to the input of the power supply system does not change. When this parameter is monitored, the current at the output of the controlled supply voltage changes, which leads to a change in voltage at the output of the power supply system. Output voltage and current waveforms are shown in FIG. 5, The numerical value of the current (in 3 is set by block 1 through the circuit Input 3 by the synchronization signal Inp.3 and is formed by the mode setting unit 2. The numerical value of the current output 5 is set by block 1 by the circuit to Input 5 by the synchronization signal 1пр 5 (see FIG. 1), Loss current control p. The test voltage is set by unit 1 through the circuit Input G. From the output of unit 2, this voltage is applied to the synchronization signal Ch 1 and is applied to the input of the controlled IOS through the switching unit 8 and terminals 9 (see Fig. 1). The loss current of the 1P (the current of the unbonded insulators) is monitored by measuring the pad A voltage across an exemplary resistor Rc6p, connected in series with the input of the controlled voltage supply. This exemplary resistor is located in block 2 (not shown in Fig. 1).

The voltage drop across the Nobr along the circuits U and Hx enters the measuring unit 1 (see Fig. 1). where it is measured and compared with the valid.

Inspection of power supply system parameters with adjustable output voltage.

The process of controlling the parameters of regulated PSIs does not differ from that described above with the exception that

the parameter sets the required voltage at the output of the controlled power supply. In the control of the Ki and Qu of the controlled IHS, the process of regulating the output voltage is performed as follows.

By synchronization signal Inp. 1 block 2 generates a voltage, the value of which is set by block 1 through the circuit Input 1. This voltage is applied to the input of the controlled IOS through the switching unit 8 and terminals 9. The voltage from the output of the controlled IOS through the terminals 9 goes to the inputs of the regulator 5 of the output voltage brides and comparator 7.

On the signal Start REN from block 1 slab

A comparator 7 is generated, which generates a signal, signal -1, depending on whether the output voltage of the controlled voltage supply is higher or lower when compared with the required voltage.

With a +1 or -1 signal, the digital control unit 6 starts to change the state of the output code downwards.

or increase. The digital code for the control circuits of the controller (P1-P12) is fed to the controller 5 of the output voltage.

Regulator 5 in accordance with the received digital code through terminals 9 changes

output voltage of the controlled supply voltage. This occurs as long as the output voltage of the controlled supply voltage does not compare with the setpoint voltage set by block 1 along the output circuit. DAC in

comparator 7. When the compared voltages coincide, the comparator 7 stops the formation of a signal along the +1 or -1 circuit, thereby fixing the establishment of the required voltage at the output of the controlled voltage supply.

(not shown in FIG. 1).

Monitoring of parameters of two-pole ISN,

The process of monitoring the parameters of a bipolar IHS is no different from that described above, except that all parameters are measured for each of the two inputs and -) and two outputs (+ and -).

The test voltage at the input + of the controlled voltage supply is formed by block 2 by setting unit 1 to the appropriate voltage across the circuit of input 1.

The test voltage at the input, respectively, of the circuit Input 2.

The current of the positive and negative outputs of the monitored ESP is set by unit 1, respectively, along the circuits of Input 3 and Input 4. The selection of the outputs of the monitored ESP is performed by the switching unit 8 (see Fig. 1).

Claims (1)

Apparatus for automatically monitoring parameters of integrated circuits comprising a measuring unit, a mode setting unit, a digital control unit, a comparator, an output voltage controller, a switching unit and terminals for connecting the outputs of a controlled integrated circuit, in order to improve the accuracy and speed, the device additionally contains a block of time intervals, including four integral timers, the outputs of the first, second and third of which form a group output synchronization of the time interval block, the output of the fourth integral timer is the output of the start signal of the block of time intervals, the ready signal generator, the output of which is the ready output of the time interval block, a clock generator connected by an output to the clock input of the first integral timer, a trigger synchronization circuit connected by the output with the start input of the first integral timer, a coincidence circuit connected by the output with the input of the ready signal generator and the input of the blue circuit ronizatsii startup write strobe generator coupled to the input of recording the first, second, third and fourth integral timers, an address decoder, a group whose outputs coupled to address inputs of the first group, the second, third and fourth integral timer, decoder selection. Timer. The first, second, third and fourth outputs of which are connected to the selection inputs of the first, second, third and fourth integral timers, the data register, the output group of which is connected to the input groups of the first, second, third and fourth integral timers, the address register and selection connected by a group of address outputs with address decoder, group of timer selection outputs with timer selector decoder, gate decoder connected by outputs of the first and second gate signals with reg The data source, the output of the third strobe signal — with a write strobe driver, a group of control inputs of the coincidence circuit, and a group of data inputs of the data register, an address register and selection register, and a strobe decoder form a group of data and control inputs of the time interval block, the voltage converter including the selection amplifier , performed on the first operational amplifier with a resistor in the reverse circuit connection and adder, the output of which is connected to the inverting input of the first operational amplifier, the non-inverting input of which is connected to the converter input via a storage capacitor, the first input of the adder is connected through a compensation capacitor and the first control switch with a common bus and through a charging resistor with an input voltage divider connected to the input of the voltage converter and to the common bus to which the non-inverting input of the amplifier is connected via the second control key, the second input of the adder is connected to just point reducer voltage The first of which is connected to the common bus, the second to the repeater input made on the second operational amplifier, the non-inverting input of which is connected to the common bus through the auto-correction capacitor and to the output of the scaling amplifier made on the third operating the scale selection amplifier and resistors, the sampling and storage circuit, the first input of which is connected to the output of the first operational amplifier and the non-inverting input of the third operational amplifier, the measurement start circuit, the input of which is the start input of the voltage converter, the output of the sample and storage circuit and the output of the start circuit form a group of outputs of the converter, the output of the measurement start circuit is connected to the control inputs of the first, second and third keys. The second output is connected to the control input of the sample and storage circuit; The measuring unit of the first group of outputs is connected to the group of amplitude settings of the mode setting unit, the second group of outputs — with a group of data and control inputs of the time intervals, the third group of outputs — with a group of comparator start inputs, and the fourth group of outputs — with a group of control inputs of the switching unit switching, the first input of the measuring unit is connected to the output of the ready signal of the block of time intervals connected by the output of the start signal with the first inputs of the voltage converter and the switching unit, the second input of the measuring unit is connected to the output of the comparator adjustment end signal, the mode setting unit is connected to the output group of the time interval block and the fifth output group of the measuring unit, the input group of which is connected to the measuring group the outputs of the switching unit, the transducer input group of which is connected to the output group of the voltage converter, the second input of which is connected to the output of the comm unit tation connected by the first group of inputs and the first group of outputs to the terminals for connecting the pins of the controlled integrated circuit, the first and second inputs of which are connected to the first and second outputs of the output voltage regulator, the group of inputs of which are connected to 0 a group of control outputs of the controller of a digital control unit connected by a group of inputs and a group of outputs with a comparator, whose input is connected to the third output of the output voltage controller and the output of terminals for connecting the outputs of the monitored integrated circuit, the switching unit of the second group of inputs and the second group of outputs is connected to block task mode. t & No.R7 Ш4 29 f 2w3 5