SU1532992A2 - Amplitude detector - Google Patents

Abstract

The invention relates to radio engineering. The purpose of the invention is to increase the reliability and stability of operation. The amplitude detector contains keys 1 and 5, comparators 2 and 6, low pass filter 3, inverters 4, 8 and 9, adder 7, adder 10 under module two, and switch 11. The input voltage of positive and negative polarities passes to adder 7, respectively via keys 1 and 5. The closure of keys 1 and 5 occurs when the voltage of a logical "zero" signal is applied to their control inputs, and the disconnection is applied when a logical "one" is applied. The goal is achieved due to the fact that the signals arriving at the control inputs of keys 1 and 5 will always be antiphase, which eliminates the possibility of their being in the open state at the same time. In this case, at the output of the adder 7, pulses of the input voltage of one polarity are formed, which are then smoothed by filter 3. 1 sludge.

Description

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The invention relates to radio engineering, can be used in radio receivers and electrical measuring devices and is an improvement of the known device according to the main auth.1, no. 1228213.

The purpose of the invention is to increase the reliability and stability of operation.

The drawing shows a structural diagram of the amplitude detector.

The amplitude detector contains the main key 1, the main comparator 2, the low-pass filter 3, the first inverter 4, the additional key 5, the additional comparator 6, the adder 7, the second 8 and the third 9 inverters modulo two and the switch 11.

The amplitude detector works as follows.

The input voltage of the positive polarity passes to the first input of the adder 7 through the power key 1, and the voltage of the negative polarity through the first inverter 4 and the additional key 5 -. the second input of the combinator 7. This mode of operation is provided by the corresponding control signals supplied to the control inputs of the main 1 and additional 5 keys. The closure of the specified keys is carried out when a voltage signal is applied to their control inputs. Oh, and disconnection - for more log. one.

If, at a negative input voltage, the additional key 5 is closed and the main key 1 is open, and the input voltage then passes through a zero value, becoming positive, then the output of the additional key 5 causes a negative voltage that converts the main comparator 2 to zero. condition. In this case, the main key 1 closes the Additional comparator 6 at the same time is transferred to the output state one at a time. This unit voltage goes to the first input of the switch 11 and passes to its output, causing the switch 5 to open, if the control input of the switch 11 from the output of the third inverter 9 to

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steps log. A. The last circumstance takes place only if the output signals of the main 2 and additional 6 comparators do not coincide. For example, in the case of coincidence of the output signals of the main 2 and additional 6 comparators, which can occur when the input signal is zero or when the power is turned on, the signal voltage at the output of the adder 10 modulo two is equal to the log. Oh, and therefore, the signal at the output of the third inverter 9 is equal to the log. 1. If the signals do not match from the outputs of the main section, chapter 2 and the additional 6 comparators, the output signal of the modulo 10 modulo two equals the log. 1 and, accordingly, the log. About at the output of the third inverter 9.

Thus, the signals arriving at the control inputs of the main 1 and additional 5 keys will always be antiphase, which eliminates the possibility of their being in the open state at the same time.

Similarly, the processes of forming control signals proceed when the input signal is reversed to the opposite.

At the output of the adder 7, the pulses of the input voltage of one polarity are formed, which are then smoothed by the filter 3 of the lower

frequencies.

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Claims (1)

Invention Formula u and Amplitude detector on avt.Sv. No. 1228213, about t h and h a raft so that, in order to increase reliability and stability of operation, the output of the additional comparator is connected to the control input of the additional key through the second inverter and switch connected in series, the second input of which is connected to the output of the additional comparator , and a modulo two adder is connected to the outputs of the main and additional comparators, between the output of which and the control input of the switch a third inverter is connected.