SU721797A1 - Comparator - Google Patents

Description

one

The invention relates to computing and can be used in analog-to-digital converters for converting hexacoustic signals into digital form.

Known comparing devices containing a differential amplifier on transistors, the outputs of which through a trigger, made on an integrated circuit, are connected to the output forming device 1. Such comparing devices have a low sensitivity, due to the large variation of parameters of digital circuits.

There are known devices that contain a differential cascade on a transistor, a current generator, a tunnel diode, a transistor switch 2. The disadvantages of these devices are low speed and low sensitivity due to the presence of reactive elements and switching to self-oscillatory mode, when the compared voltages are close to each other.

The purpose of the invention is to increase the speed and sensitivity of the comparator device.

To do this, an additional transistor was inserted into the device containing a differential cascade on transistors with a current generator in the emitter circuit, the collectors of which are connected to the power bus: one directly, the other through a tunnel diode connected between the emitter and the base of the transistor switch

0 resistor, delay line and D-trigger, whose information input is connected to the collector of the transistor switch, and the input through the delay line is connected to the input synchronization bus and base of the additional transistor connected by the collector directly, and the base through the resistor to the power bus while the emitter is additional

The 0 transistor is connected to the emitters of the transistors of the differential cascade.

The drawing shows a schematic diagram of the device.

five

The device contains a differential cascade on transistors 1 and 2, a current generator on transistor 3 and resistors 4, 5 and 6, a tunnel diode 7, a transistor switch, made

0 on the transistor 8 and the resistor 9, to

Claims (1)

Claim Comparison device containing a differential cascade on transistors with a current generator in the emitter circuit, the collectors of which are connected to the power bus; one directly, the other through a tunnel diode connected between the emitter and the base of the transistor switch, characterized in that, in order to improve the speed and sensitivity of the device, an additional transistor, a resistor, a delay line and a D-trigger are inserted into it, the information input of which is connected to the collector transistor of the transistor switch, and the clock input through the delay line to the input synchronization bus and the base of the additional transistor connected directly to the collector, and the base through the resistor to w No power, the additional transistor emitter connected to the emitters of transistors of the differential stage.