DE3128764A1 - Electronic counter - Google Patents

Abstract

In this electronic modulo-10 counter, the resetting of the relevant flip flop is preselected by the own counting output as in the electronic counter according to the main patent application (P 3047169.3). In contrast to the electronic counter according to the main patent application, each decade in the present electronic modulo-10 counter only consists of six flip flops which are combined with delay circuits. One flip flop of these is the change-over flip flop; the remaining five flip flops of each decade are the counting flip flops. <IMAGE>

Description

Electronic counter

The invention relates to an electronic counter based on the basic counter principle the main patent application. The further training consists of this according to the invention in the fact that this 1-out-of-1O modulo counter does not consist of 10 counting flip-flopps, but consists of only 5 counting flip-flopps and that the flip-flopps of versions 2 Have special input circuits which have an AND input and an OR input to have. The required two-time switching of the display pre-control is according to the invention caused by an additional flip-flop, which is from the output of the first flip-flopps. The third subject matter is in that there are delay switches in the output lines of the flip-flopps are arranged through which the S-pre-control of the next flip-flop and the R-Vor-activation of this flip-flop is delayed long enough so that the Counting pulses do not come into effect twice or three times and then a wrong one Deliver counting result.

The electronic up counter, or a decade of this electronic one Up counter is shown in Figure 1 with normal flip-flop input circuits and in Figure 1b with OR circuits and combined circuits that have an AND input and have an OR input. The electronic backward counter or a The decade of this electronic down counter is shown in FIG. 2 with normal flip-flop input circuits shown and in Figure 2b with OR circuits and combined circuits, which have an AND input and an OR input.

The electronic up counter, or a decade of this electronic one Up counter, which is shown in Figure 1, consists of 5 counting flip-flopps 1 to 5 and a changeover control flip-flopp 6 and 8 delay circuits 7 to 14 and 6 OR circuits 17 to 22 and 12 AND circuits 23 to 34 and 10 further AND circuits 35 to 44 and the decade carry AND circuit 45. The counting pulse input has the designation E and the decade carry output the designation U. The reset control line has the designation R.

The operation of this up-counting circuit, consisting of one The number of decades according to Figure 1 results as follows: After the entire counting circuit by activating the lines R with an H current pulse have the counting flip flopps 1 to 4 at their counting output (left-hand output) L-potential and the flip-flop 5 at its counting output H-potential. Here is the reversing flip-flop 6 is also reset, provided that the flip-flop 6 is on its left-sided output has H-potential. So that is over line a Counting flip-flopp 1 S-pre-controlled and the flip-flopp 5 R-pre-controlled via line b.

When the first counting pulse arrives at input E, it therefore tilts the flip-flopp 1 in its one position, in which its counting output (left shown Output) has H potential and the flip-flop 5 is in its zero position Counting output (output shown on the left) has L potential.

The reversing flip flopp 6 is thus controlled via line c, this through the effect of its pre-control (lines d and e) in its other Switching position flips, in which its left output H-potential and its right output Has L potential. The display digits are in this switch position of the reversing flip-flop 6 1 to 5 pre-controlled, which means that flip-flop 1 does not have the number 6, but the Number 1 indicates. The H potential at the counting output of the flip-flop 1 is now the flip-flopp 2 S-pre-driven and the flip-flopp 1 R-pre-driven, whereby at the second time. Counting impulse flips the flip flop 2 into its one position and that Flip-flop 1 flips into its zero position.

By pre-controlling the left-hand output of the reversing flip-flop 6 has the AND circuit 36 at its output H potential and thus shows the number 2 on. After the fifth count pulse at input E, the AND circuit shows in this way 39 number 5. This is back on the line a the flip flop 1 S-pre-controlled and the flip-flopp 5 R-pre-controlled via line b. When the sixth counting pulse arrives, flip-flop 1 flips over again in its one position (H potential at the left-hand output shown) and the flip flopp 5 in its zero position (L potential on the left-hand side shown Exit).

From the count output of the klipp-flop 1, the Flip-flop 6 is controlled via line c, which in this case is again in its switch position changes and now has H potential at its right-hand output, so the Control line i H potential and the flip-flopp 1 does not show the number 1, but the number 6 (via the AND circuit 40). This means that the flip-flopp 2 is S-pre-controlled again and the flip-flop 1 R-pre-controlled, whereby the flip-flop 2 tilts to its one position and the flip-flop 1 tilts to its zero position and whereby the AND circuit 41 displays the number 7. After the eighth counting pulse In this way, the AND circuit 42 indicates the number 8. After the ninth count In this way, the AND circuit 43 indicates the number 9, whereby the decade carry is pre-driven at the AND circuit 45.

The tenth counting pulse triggers the decade carry at the AND circuit 45 and also causes the flip-flop 5 to snap on the left-hand side from L to H, whereby the AND circuit 44 indicates the digit zero.

The same type of electronic backwards counter, of which one decade shown in FIG. 2 consists of the same parts as that shown in FIG Forward counter. The down counter (Figure 2) shows in comparison with the up counter (Figure 1) on the difference that the line k is not connected to the output of the AND circuit 43 is connected, but to the output of the AND circuit 44 and that the flip-flopps are not S-pre-controlled by their flip-flop arranged to the right of it, but from her counting flip flop arranged to the left and that the line c is connected differently and that line a is connected differently.

In FIGS. 3 to 5 there are 3 special singing circuits for flip-flopps shown, which have AND inputs and OR inputs and thus flip-flop input circuits corresponding to Figures 1b and 2b. The input circuits shown in FIGS. 3 to 5 have 2 AND inputs A 1 and A 2 and 3 OR inputs A 3, A 4 and A 5. the output has the designation B and the neutral line the designation n. The special input Circuit according to FIG. 4 has a dynamic output because it is still a capacitor 51 is arranged. The special input circuit according to FIG. 5 also has the capacitor 51 and a second drain line with resistor 52.

In Figure 6 a very simple delay circuit is shown, which may be sufficient for the electronic meters shown. These Delay circuit has an input A and an output B and consists of the Resistors 61 and 62 and the transistor 63. The operating voltage supply line has the designation m and the neutral line the designation n. The resistor 62 must be greater than the resistor 61. The delay becomes greater when the resistances are larger can be arranged and smaller if smaller resistors are arranged.

The delay circuit according to Figure 7 is also still with a Capacitor 64 is provided. In this delay circuit, too, the operating voltage supply line has the designation m and the zero line the designation n. Also with this delay circuit the resistor 62 must be greater than the resistor 61, with both delay circuits (Figure 6 and Figure 7) the resistor 62 must be larger to twice as large as the resistance 61.

If with these two delay circuits according to Figure 6 and 7 is not a sufficiently good effect can be achieved, come as delay circuits Mono-flopps or other delay circuit for use. The illustrated Number switching is controlled with up switching edges. The types B of this Counting circuits are controlled with downward switching edges and are accordingly educated.

L e r s e i t e

Claims (1)

Claims 1) Electronic forward counter, consisting of Flip-flopps, which go one-forward to the next flip-flop in the up-counting direction and self-zero-advance, characterized in that a decade cycle consists of two runs and that a decade has only 5 counting flip-flopps. 2) Electronic up counter according to claim 1, characterized in that that no double flip-flopps are used and that in the output lines the flip-flopps, if necessary, delay circuits are arranged. 3) Electronic up counter according to claim 1 and claim 1 and 2, characterized in that the two-time display control by an additional flip-flop is obtained. 4) Electronic up counter according to claim 1 to 3, characterized in that that also the reversing flip-flopp (6) in its output lines delay circuits (12 and 13). 5) Electronic up counter according to claim 1 to 4, characterized in that that with a certain type the flip-flopps have special input circuits, which have both AND inputs and OR inputs. 6) Electronic backward counter, consisting of flip-flopps, which in the backward counting direction the next flip-flop one-pre-drive and zero-pre-drive themselves, characterized in that a decade cycle consists of two runs ?) Electronic backward counter according to claim 6, characterized in that no double flip-flopps are used and that in the output lines of the flip-flopps, if necessary, delay circuits are arranged. 8) Electronic backward counter according to claim 6 and claim 6 and 7, characterized in that the display is reversed twice by a additional flip-flop is produced. 9) Electronic backward counter according to claim 6 to 8, characterized characterized in that the reversing blipp-flopp (6) is also in its output lines Has delay circuits. 10) Electronic backward counter according to claim 6 to 9, thereby characterized in that with a certain type the flip-flopps special input circuits that have both AND inputs and OR inputs. 11) Other electronic counting circuits, characterized in that that they have combined circuits with AND inputs and OR inputs. 12) Other electronic circuits, characterized in, net, that they have combined circuits with AND inputs and OR inputs. 13) Other electronic counting circuits, characterized in that these have delay circuits consisting of a transistor (63) and an inflow resistor (61) and an outflow resistor (62) and from the associated Lines exist. 14) other electronic counting circuits according to claim 13, characterized characterized in that the r2'ypen B of these delay circuits are additionally still have a capacitor (64) on one side with the operating voltage supply line is conductively connected and on the other side conductively connected to the output line is. 15) Other electronic circuits, characterized in that these delay circuits according to claims 13 and 14 have.