SU1171986A2 - Device for discrete controlling of signal level - Google Patents

Abstract

THE DEVICE OF DISCRETE ADJUSTMENT OF THE LEVEL OF SIGNAL according to the author. St. No. 462270, characterized in that, in order to reduce the likelihood of an error in setting the signal level, the first 1-SHI element and the AND element, the second OR element, whose output is connected to the second input of the And, N first triggers, are entered into it, where N is equal to the number of outputs of the reversible counter, the outputs of the first triggers are connected to the corresponding inputs of the first element OR, N second triggers, the outputs of which are connected to the corresponding inputs of the second element OR, N first inverters, N second inverters, output el And is connected to the input of the counting pulses of the reversible counter, and its third input is the input of the counting pulses of the device, the input of the first inverter number 1 (h 1.2, ..., V) is connected to the output of the -th current switching element of the D / A converter, its output is connected to the input of the first trigger number i, the input i of the second inverter number i is connected to the i output of the reverse (L counter, and its output is connected to the input of the second trigger number i, another input of the first trigger number i connected to the) output A common counter, another input of the second trigger number t is connected to the output of the ith current-switching element of the digital transducer of the transducer i. uh oh)

Description

The invention relates to radio engineering, can be used when receiving discrete information via communication channels, and is an improvement of the device according to autor. No. 462270 The purpose of the invention is to reduce the likelihood of error in the signal level setting ... The drawing shows the electrical circuit diagram of the device discrete adjustment of the signal level. The device contains a reversible counter 1, a digital-to-analog converter 2, a differential terminal 3, an amplifier 4, the first element OR 5, an element AND 6, the second element OR 7, the first triggers 8, the second triggers 9, the first inverters 10, the second inverters 11 and current-switching elements 12 digital-to-analog converter 2. The device operates as follows: rum. . A potential control signal, generated when the adjustable level is tilted from a given value, is sent to. the corresponding input of the reversible counter 1, depending on which way the level deviation took place. When a clock pulse arrives through an element; And 6 on reversing counter 1, a new code number is recorded in the latter. Under the action of potentials. removed from the outputs of the reversible counter 1, include the first triggers 8 corresponding to them. Switching on at least one of the first triggers 8 OR 5 inserts through the switches and clock elements to pass AND 6 to the input of the pulses through the counter 1 element 1 After switching on the current-switching elements 12, the first the triggers 8 through the first inverters 10 are turned off. At the output of the first element OR 5, a high logic level signal appears and, through the element AND 6, the next clock pulse arrives at the reversible counter 1. Under the action of each clock pulse, certain triggers included in the reversible counter 1 are also turned off, depending on the code number being written. At the same time, the corresponding second triggers 9 are turned on through the second inverters 11. Switching on at least one of these triggers through the second element OR 7 prohibits the passage of clock pulses through the AND 6 element to the clock input of the reversing counter 1. After switching on the current-switching elements 12, the second triggers 9 are turned off. At the output of the second element, OR 7, a high logic level signal appears that gives permission to pass through. The element of the next clock pulse. When the current-switching elements 12 are turned on, the gain of the differential amplifier 3 changes in proportion to the code taken from the outputs of the reversible counter 1 through the amplifier 4.

Claims (1)

DEVICE FOR DISCRETE SIGNAL LEVEL ADJUSTMENT by ed. St. No. 462270, characterized in that, in order to reduce the likelihood of errors in setting the signal level, the first OR element and the And element are connected in series, the second OR element, the output of which is connected to the second input of the And element, N of the first triggers, where N is the number of outputs of the reversible counter, the outputs of the first triggers are connected to the corresponding inputs of the first OR element, N second triggers, the outputs of which are connected to the corresponding inputs of the second OR element, N first inverters, N second inverters, element output connected to the input of the counting pulses of the reversible counter, and its third input is the input of the counting pulses of the device, the input of the first inverter with the number ί (<= 1,2, ...,.) is connected to the output of the ίth current-switching element of the digital-to-analog converter, and its output connected to the input of the first trigger with number 1, the input of the second inverter with number <connected to the i-th output of the reverse counter, and its output connected to the input of the second trigger with number ι, the other input of the first trigger with number <connected to the) -th output of the reverse counter, d ugoy input of the second latch with the number <coupled to an output ί tokokommutiruyuschego -th element Vatel digital to analog transformations. > 1171