SU1243094A1 - Multichannel time-pulse converter - Google Patents

Abstract

The invention relates to a pulse technique and can be used in information gathering systems for the automation of technological processes, scientific research and production tests. The aim of the invention is to improve the accuracy and speed of the multichannel time of the pulse converter by reducing the errors associated with instability of the parameters of the discharge circuit and reducing the discharge time. At the first stage, the clock pulse generator 15 sets the trigger 14 to one state, connecting the non-inverting input of the comparator, which is complete on the operational amplifier 8, to the output of the resistor divider 2 of the reference voltage using the second 9 and third 10 keys. In this case, the key element, executed on the transistor 11, is locked, the first switch 7 is opened, and the switch 1b switches the corresponding resistor sensor 3 to the power supply 1 with the help of measuring switches 6 ..., 6 the standard integrating element 5 to the level of the reference voltage. The pulse from the pulse generator 13 returns the trigger 14 to the initial zero state, generates a signal on the output bus 17, and opens the keys 6. In the second stage, the power source 1 through the first C /)

Description

the switch 7 and the current-limiting element, produced on the resistor 4, are connected to the inverting input of the operational amplifier 8, the non-inverting input of which by means of the switch. 9

commutates on a common bus that is absorber 11. 1 silt,

The invention relates to a ig pulse technique and can be used in information gathering systems for the automation of technological processes, scientific research and production tests.

The purpose of the invention is to improve the accuracy and speed of the conversion by reducing the errors associated with the instability of the parameters of the discharge circuit of the reference capacitor, and reducing the discharge time.

The drawing shows a block diagram of a multichannel pulse converter time.

The multichannel time of the pulse converter contains a power source 1, the output of which is connected to a resistor divider 2 of the reference voltage, resistor sensors 3), .. 5 3j, current limiting element, made on a resistor 4, an example of an integrated element (co-sensor) 5, measuring the keys 6 $ are the first key 7, the comparator is made on the operational amplifier 8, the inverting input of which is connected to the first output of the exemplary integrating element 5, and the non-inverting input through the second key 9 with the bus and through the third key 10 - with the output resistor divides (Chapter 2, a Gyushyovy element 5 is implemented on the transistor 11, the collector of which is connected to the source 12 of the reverse polarity, the driver 1 pulses, the trigger 14, the generator 15 clock pulses, the switch 16 and the output bus 17.

Multichannel time pulse converter works as follows.

It cuts the fast discharge of the reference integrating element 5 with the help of a circuit formed by the reverse polarity voltage source 12 12 of the operational amplifier 8 and the open trancd cl converting the sensor parameters to the time interval consists of two stages.

At the first stage, the impulse of the generation “; the torus 15 clock pulses the trigger 14 is set to one state j and the switch 16 prepares to switch on the next measuring I key 6. The trigger 14 opens the second

 the key 9 and closes the third key 10, disconnecting the sag-1st non-inverting input of the operational amplifier 8 of the common layer and connecting to it the output of the resistor divider 2 of the reference voltage. The transistor 11 is locked, the operational amplifier 8 switches to the voltage comparator operation mode. At the same time, the trigger 14 opens the first switch 7 and, through the switch 16, pushes the next measuring switch 6, supplying power from the source 1 to the corresponding polling resistor sensor 3. The exemplary integrating element 5 is charged according to the exponential law. B the moment when the voltage on the exemplary integrating element 5 reaches the same reference voltage, the comparator on the operational force1: barely 8 is triggered, returning the trigger 14 to the initial zero state via the driver 13. The key 6 is disconnected, the duration of an I Shulse from the output of the trigger 14 is proportional to the resistance of the corresponding resistor sensor 3.

At the initiator stage, trigger 14, returning to the zero state, disconnects the inverting input of the operation unit 8 from the resistor divider 2 of the reference voltage and connects ei o to the common bus, applying a zero voltage to it. Simultaneously, the trigger 14 closes the first key 7, connecting the resistor 4 to the source 1,

five

0

Operational amplifier 8 opens transistor 11 and exemplary integrating element 5 is quickly discharged to bias voltage of operational amplifier 8. In the second stage, the circuit consisting of source 12 of reverse polarity of operational amplifier 8 and transistor 11 operates as a voltage regulator Since in this mode the voltage on the non-inverting input of amplifier 8 is zero, the output voltage of the stabilizer is determined only by the bias voltage of the amplifier. The resistor 4 provides the specified operating current of the transistor 11.

Claims (1)

Invention Formula A multichannel time pulse converter containing a power source whose output is through parallel connected circuits of serially connected measuring switch and resistor sensor each connected to the first output of an exemplary integrating element whose second output is a common bus, a comparator, three switches and a trigger, the first transmitter which is the output bus, and the first input is connected to the first output of the clock, the second output of which is connected to the first input of the switch, which are connected to rows. the control inputs of the respective measures. And-Derbak Editor. Order 3716/55 Compiled by V.Voitov Tehred O. Sopko Proofreader O. Lugov Circulation 816 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, Projecto st., 4,  tel keys, characterized in that, in order to increase the accuracy and speed of the converter, a source of reverse polarity voltage, a key element, a current-limiting element, implemented on a transistor, a resistor divider of the reference voltage and the pulse shaper, and the comparator is made on an operational amplifier, while the pulse shaper input is connected to the base of the transistor, whose collector is connected to the top of the reverse voltage source ter - to the first input of the sample integrating element and the inverting input of the operational amplifier, and through a resistor and the first 0 key to the output of the power source; the reference voltage, and the output through the pulse shaper is connected to the second trigger input, the first output of which is connected to the second input of the switch, and the output of the power source is connected to the input of the resistor divider PORN voltage and control inputs of the first and second keys are combined and connected to the second output of the flip-flop, a first output connected to the control vho5 house of the third key.