SU1196955A1 - Radio frequency flip-flop - Google Patents

Abstract

RADIO FREQUENCY TRIGGER containing the first and second resonant circuits, the inputs of which are the RF trigger trigger inputs, the first and second amplifiers, the first inputs of which are connected respectively to the outputs of the resonant circuits, the first and second detectors, the inputs of which are connected to the first inputs of the corresponding amplifiers, the outputs of the amplifiers connected to the inputs of the corresponding resonant X circuits, characterized in that, in order to widen the scope of the trigger by implementing the third steady state , the first and second threshold elements are entered into it, the first and second comparison elements, the outputs of which are connected to the second inputs of the corresponding amplifiers, the inputs of the threshold elements are connected to 9 outputs of the respective detectors, the outputs of the threshold elements (L are connected to the first inputs of the corresponding comparison elements,. the second inputs of which are connected to the outputs of the respective detectors.

Description

The invention relates to computing, in particular, to the technique of storage devices, and can be used in devices for processing and storing the information presented in a radio pulse form. The purpose of the invention is to expand the scope of application of the trigger by implementing the third steady state. FIG. 1 shows the functional implementation of the proposed radio frequency trigger; in fig. 2 characteristic of one of the threshold elements .. .... The trigger contains resonant circuits 1 and 2, detectors 3 and. 4, amplifiers 5 and 6, elements 7 and 8 of the comparison, and threshold elements 9 and 10. The trigger functions as follows. The selection of the operating point of the amplifier 5 or 6, having a rigid characteristic, is made in such a way that in the autonomous mode, when the supply voltage is applied and if there are no input signals, the trigger remains in the zero position. When the input signals of a small amplitude arrive at the trigger input, the generators of each arm, formed by oscillatory circuits 1 and 2 and amplifiers 5 and 6, begin to work independently in the weight mode. The independence of the operation of two hegerators for small input signals is ensured by the fact that the threshold elements 9 and 10 have a threshold characteristic for the input signal (Fig. 2). At small amplifiers removed from the output of the Z. and 4 detectors (less than the threshold), the cross negative feedback is disabled. The feedback through detectors 3 and 4, elements 7 and 8, is positive and shifts the operating point of amplifiers 5 and 6 to the area of decreasing stiffness, and the shift occurs faster in that arm that receives an input signal larger than amplitude. When the input signal exceeds a certain threshold value (at the input), the generator goes into self-excitation mode. This threshold is more quickly reached by a signal with a larger input amplitude. The threshold of elements 9 and 10 corresponds to the amplitude of oscillations in the resonant circuit 1 and 2, which is necessary for the generator to go into the excitation mode (somewhat higher). In this case, negative feedback is connected through threshold elements 9 and 10, the second inputs of elements 7 and 8 to the control inputs of amplifiers 5 and 6. At element 7 or 8, in which the generator has not yet entered the excitation mode, voltage v is subtracted. kv, which leads to a shift of the operating point in the amplifier 5 or 6 in the area of increasing stiffness and E as a result locks it. In this case, the cross-negative feedback from this arm is broken, and the generator of the other arm goes into the autogeneration mode. The autogeneration mode is supported by the fact that the initial offset, which provides the hard mode, is compensated by the voltage taken from the output of detector 3 or 4 and fed to one of the element inputs. 9 or 10. I. The resetting of the trigger, which is in one of the stable states, to its initial state can be made or by a forced reset. catfish from a reset signal supplied from the outside (clocking), or an internal reset signal generated in a standard way (asynchronous operation mode). In the proposed trigger, in addition to two stable states characterized by the excitation of oscillations at one of the frequencies used, co, or Wj, there is a steady state characterized by the absence of oscillations in its shoulders in the absence of a signal at the input. The third steady state allows us to significantly expand the scope of information exchange lines represented in the radio pulse form, by using Asynchronous mode, reducing the amount of software support for the exchange of information. The proposed trigger has a higher response rate due to the fact that negative cross feedback does not function continuously due to the introduction of threshold elements.

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 In order to output the hard drive, which is used in this scheme, to the excitation mode, the amplitude of the input signal must exceed the excitation threshold. However, for each amplitude of the input signal that exceeds the threshold, there is mshsh969554

the required exposure time. this signal for the generator to go into excitation mode. Consequently, the effect on the input of short sigNAs noise interferes with the triggering of the trigger circuit, which increases the noise immunity of such a device.

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FIG. 2

Claims (1)

A RADIO-FREQUENCY TRIGGER containing the first and second resonant circuits, the INPUTS of which are the INPUT of a radio-frequency trigger, the first and second amplifiers, the first inputs of which are connected respectively to the outputs of the resonant circuits, the first and second detectors, the inputs of which are connected to the first inputs of the corresponding amplifiers, the outputs amplifiers are connected to the inputs of the corresponding resonant circuits, characterized in that, in order to expand the scope of the trigger due to the implementation of the third steady state, in the first and second threshold elements are introduced, the first and second comparison elements, the outputs of which are connected to the second inputs of the respective amplifiers, the inputs of the threshold elements are connected to the outputs of the respective detectors, the outputs of the threshold elements are connected to the first inputs of the corresponding comparison elements, the second inputs of which are connected to the outputs appropriate detectors. SIJ „„ 1196955 FIG. 1