SU1347174A1 - Chatter-eliminating device - Google Patents

Abstract

The invention relates to devices of pulsed technology, in particular, to schemes for alternately launching electronic devices from several contact groups in computer equipment control panels when starting electronic digital devices from mechanical nodes. The aim of the invention is to simplify the device. The device contains N channels. Each ifpo8enb isanoiko. The channel consists of a 3-pin group 1-N, a 2-N RS flip-flop and a 3-N resistor, and a resistor 4, common to all channels. When the i-th contact group is triggered and its initial state is returned, at the output of the i-ro trigger a bounce-free pulse is formed — a command whose leading edge coincides with the first touch of the switching and closing contacts in the fourth phase (the bounce of the closing and switching contacts of the group) of the i-th contact group, and the back front - with the first contact of the switching and disconnecting contacts in the second phase (the bounce of the closing and switching contacts at the beginning of the contact group operation) this contact group. 1 il. § (L with 4: 1 4 g Level of warning

Description

The invention relates to a pulse technique, in particular, to schemes for alternately launching electronic devices from several contact groups in computer equipment control panels when starting electronic digital devices from mechanical nodes.

The aim of the invention is to simplify the device.

The drawing shows a diagram of the proposed device.

The device contains N channels, each of which consists of a 3-pin 1-N group, a 2-N RS flip-flop And a 3-N resistor, as well as a resistor 4 common to all channels. The switching contact of the first contact group is connected to the bus 5 Installation level. The opening contact of the i-th contact group, where i 1,2,3, ..., (N-1), is connected to the switching contact (1 + 1) -th contact group, the closing contact of the N-th contact group is connected to R -inputs all trigger 2-1 -2-N and through a resistor 4 with a bus 6 an anchor level. The closing contacts of all contact groups 1-1 - 1-N are connected to the S-BXO-s of the respective triggers 2-.1 - 2-N and through the resistors 3-1 - 3-N with the bus 6 Connection level. The outputs of the flip-flops 2-1 - 2-N are connected to the corresponding outputs of the device. The operation of any contact group can be divided into the following phases: first phase - stable closure of the closing and switching contacts before the start of the contact group (initial state); the second phase is the bounce of the closing and switching contacts at the beginning of the operation of the contact group; third phase - complete disconnection of the closing contact with two other contacts of the group (contact span) fourth phase - bounce of the closing and switching contacts of the group; The nth phase is stable closure of the closing and switching contacts. When the contact group returns to its original state, the phases are reversed.

The device works as follows.

In the initial state, all the triggers are kept in the O state, so

five

as the R-inputs of all triggers 2-1 2-li The installation level enters through the serial connection of contact groups (first phase). When the i-th contact rpynniii is triggered, the contacts of this group pass through all the specified phases, starting from the second. At the same time, while the i-contact group is in the second phase for all the 2-1 to 2-N flip-flops, the zero state is confirmed by the bounce signal at their K-inputs. During the third phase. the triggered state of the contact group 2-1 - 2-N also does not change, since the R and S inputs of all the triggers are only connected to bus 6 Link level. In the fourth phase, when the contacting and closing contacts of the i-th contact group are first touched, the S input of this trigger is connected to bus 5 the installation level and the trigger is set to state 1. With further bounce of the closing and switching contacts, the bounce signal is present only at the S-input of the i-ro trigger 2-i, confirming its single state. The state of the remaining triggers does not change. In the fifth phase of operation of the contact group, the state of all the triggers does not change (the trigger of the i-ro channel in state 1 is the rest in state O).

When the initial state of the i-th contact group is restored, the state of the triggers does not change until the second phase (the phases change from the fifth to the first). At the first touch of the switching contact with the opening contact, the i-th trigger returns to the initial zero state, as bus 5 is connected to its R-input (and R-inputs of other triggers). Installation level. Subsequently, the state of the triggers does not change until the next triggering of any contact grupp. When any contact group is activated, the operation of the circuit is repeated in the same sequence.

Thus, when the i-th contact group is triggered and returned to its initial state, at the output of the i-ro trigger a bounce-free impulse (command) is formed, the leading edge of which coincides with the first contact of the switching and closing contact

five

0

five

0

five

313

in the fourth phase of the forward stroke of the i-th contact group, and the trailing edge - with the first touch of the switching and opening contacts in the second phase of the reverse stroke of this contact group.

Claims (1)

Invention Formula A debounce device containing N contact groups, N resistors and N RS-flip-flops, the outputs of which are the outputs of the device, characterized in that, in order to simplify the device, the S-inputs of each of the N RS-flip-flops are connected to wiring contacts Editor I. Shulla Compiled by N. Tsygankov Tehred I.Popovich Proofreader A.T. Order 5127/51 Circulation 899 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035 ,; Moscow, Zh-35, Raushsk nab. 4/5 Production and printing company, Uzhgorod, st. Project, 4 744. corresponding contact groups and through the corresponding resistors with the bus The tie-in level and the bus The installation level is connected to the switching contact of the first contact group, the disconnecting contact of which is connected to the switching contact of the second contact group and the disconnecting contact of each previous contact group group and the N contact of the contact group is connected to the R-inputs of all N RS-flip-flops and through a resistor with a bus Level tie.