SU1231600A1 - Reading amplifier - Google Patents

Abstract

The invention can be used as a readout memory amplifier. The purpose of the invention is to reduce power consumption, simplify the design and extend the functionality. The amplifier contains transistors 1 and 2, diodes 3 and 4, transistor 5, thyristor 6, resistors 7-10, thyristor 11, information input 12, resistor 13, dual-emitter transistor 14, control inputs 15 and 16, output 17, Introduction thyristor 6, resistor 13 and two-smitter transistor 14 allowed to exclude blocking of control inputs 15 and 16, which led to simplification of the amplifier; saving power consumption is achieved by using a feedback circuit - thyristor 6, the collector-emitter of the transistor 5, 1SH-H1Y of zero potential; Expansion of functionality is achieved through the implementation of an additional function of the amplifier — the function of storing the read information. 1 silt, i (Л С (ч; САЗ Gi:

Description

The invention relates to a pulse technique, in particular to microelectronics, and can be used as a read amplifier for memory devices.

The purpose of the invention is to reduce power consumption, simplify the design and extend the functionality by ensuring that the read information is stored.

The drawing shows a circuit diagram of a read amplifier,

The circuit contains transistors 1 and 2, diodes 3 and 4, transistor 5, first thyristor 6, resistors 7 g-10, thyristor 11, information input 12, resistor 13, two-input transistor 14, control 1, and inputs 15 and 16 , output 17. The collector of transistor 1 is connected to the power bus, the emitter is connected to the base of transistor 2, the collector of which is connected to the cathode of the first of two series-connected d, iodides 3 and 4, and SND-iTTep is connected to the common ip and transistor 5 of the emitter, collector which is connected to the base of the first transistor, the base of the first thyristor 6, which is connected to the anode of the second diode 4 and with a resistor 7 the second end of which is connected to the anode of the thyristor 6, whose cathode through a resistor 8 is connected to the base of the transistor 5 and one output of the resistor 9 BTopoii whose output is connected to a common bus and one end of the resistor 1 BTopoii the output of the second and turn connected with the emitter of the transistor 1. The circuit also contains a thyristor 11, the anode of which is connected to the power bus, its h-base is the information input 12 of the circuit, the J-base. connected to a resistor 13, the second output of which is connected to the cathode of the thyristor 11 and the anode of the thyristor 6. The p-base of the thyristor 11 is connected to the base and the collector of the two-emitter transistor 14, both of which connects C1-1e inputs 15 and 16 which are equalizing inputs booster. The collector of transistor 2 is the output 17 of the circuit.

The read amplifier operates as follows.

If the value (l-base of the thyristor 11 (input 12) even briefly flows a current, and the control inputs 15 and 16 of the transistor 14 are energized according to the logic 1, then the thyristors 6 and 1 1 turn on

the collector of transistor 5 is set to the voltage level, defined as

and

K5

and l -25- (R, + Ra) +

thyristor 6,

0

five

s

0

five

0

five

0

five

Where

U

U,

5ЗЕ voltage drop at the base-emitter junction of transistor 5;

- thyristor base-cathode 6 voltage drop at the p-base junction - thyristor cathode 6 (approximately equal to

 B)

For example, U ,. does not depend on supply voltage. This ensures the voltage supply at the base-emitter junctions of transistors 1 and 2. The voltage condition at the output of the circuit 17 with a load current provides negative current feedback from the p-base of the thyristor 6 through diodes 3 and 4 to the output 17 of the circuit. The output transistor 2 of the amplifier is open,

Thus, the short-term flow of current in the circuit of the i-base of the thyristor 11 causes it to turn on and, as a result, turn on the output transistor 2, i.e. the function of storing the read information is implemented.

In this case, the resistor 13 shunts the p-base-to-cathode transition of the thyristor 11 and determines the minimum value of the current in the circuit; and base. thyristor input 12 11, at which it is turned on, i.e. the resistor determines the threshold of the amplifier according to the information input 12. Resistor 7 determines the magnitude of the current in the p-base of the thyristor 6 in the on state. In this case, the thyristor 6 is in active mode due to the effect of negative current feedback. The feedback circuit is a thyristor 6, a collector-emitter of transistor 5, a zero potential bus. This saves power consumption.

Resistor 10 shunts the base-emitter junction of the output transistor 2, ensuring the dissipation of excess charge from the base of this transistor when it is turned off.

If there is no current in the circuit of the thyristor 11 h-base (input 12) or

If one of the control inputs 15 or 16 of the circuit, the voltage corresponds to the level of logic zero, then the thyristor 11 is closed. In this case, the thyristor 6 is also closed, due to which the current in the base of transistor 1 is absent and therefore the output transistor 2 is also closed.

Since to enable the amplifier, a sufficient amount of current is required for the information input 12, there is no need to block the control inputs 15 and 16 of the amplifier during the transition process, which leads to a significant simplification of the amplifier circuit.

Claims (1)

Formula of Absorption A read amplifier containing the first transistor, the collector of which is connected to the power bus, and the emitter - to the base of the second transistor, the collector of which is connected through two series-connected diodes to the base of the first transistor, to the P-base of the first thyristor, to the first output of the first resistor and to the collector of the third transistor emitters are expensive Compiled by G. Krapina Editor T. Parfenova Tehred I. Popovich Corrector -Samborska - Order 2660/57 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 and the third transistor is connected to the common bus, the first transistor emtter is connected to the common bus through the second resistor, the second output of the first resistor is connected to the anode of the first thyristor, whose third resistor is connected to the base of the third transistor and the first output of the fourth resistor, A common bus, the collector of the second transistor is connected to the output bus, characterized in that, in order to reduce power consumption, simplify the circuit and expand its functionality, V There is a thyristor, a fifth resistor and a two-emitter transistor, the anode of this thyristor is connected to the power bus, its i-base is connected to the information input, and the P-base is connected to the base of the two-emitter transistor connected to the corresponding control inputs circuit, and the collector - with its base and the first output of the nth resistor, the second output of which is connected to the cathode of the second thyristor and the anode of the first thyristor.