JPS5843630A - Current injection type logical gate circuit using josephson effect - Google Patents

Abstract

PURPOSE:To operate a logical gate circuit of the product at a high spped, by supplying a current to 2 Josephson junctions and 3 resistances, respectively, from 2 input lines, and fetching an output from the Josephson junction connected to a connecting point of the resistance. CONSTITUTION:To a Josephson JS junction 30 whose one terminal has been grounded 40, an input line 38 for injecting an input current Ia, and resistances 33, 34 are connected, and to the other terminal of the resistance 33, a JS junction 31 whose one terminal has been grounded, an output line 36 terminated by a load resistance 37, and a resistance 35 are connected. To the other terminals of the resistances 34, 35, a JS junction 32 whose one terminal has been grounded 40, and an input line 39 for injecting a current Ib are connected. The transition current values I01, I02 and I<03> of the JS junctions 30-32 are set to I01=I03=I02/2=I0, and the resistance values r1, r2 and r3 of the resistance 33-35 are set to r1=r3=r2/2. In a state that only one current in the currents Ia, Ib flows, the logical gate is not transferred to a voltage state unless a current exceeding 3Io flows. In case of exceeding a curent Ia=Ib=Io, the logical gate circuit is transferred to the voltage state, has a wide operation margin and high gain, and executes its operation at a high speed.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to a logic circuit using the logic effect, and more specifically, the present invention is based on the logic dart circuit using the logic effect, and more specifically, the logic circuit uses the logic gate effect to perform the product logic. -Nine logic gate circuits are illustrated in the literature Applied Featus Letter Magazine (Mupphed Pbysl*s L@tt@r
s,) Vol, 33. ? In 8゜pp, 78
1~yss t- As you can see, it is widely known in the field of technical books that these 0 logic gate circuits can be used to connect multiple O di-Cefnon junctions and electrically A loop consisting of an inductance that is connected to a logic gate is constructed by a loop consisting of an inductance, which is connected to the interference layer by injecting a current into the logic gate circuit, or by injecting a current into the interference layer logic gate circuit. It is switched by the input current and amIa Yukura.

Garden III is a theory that performs product logic by current injection.■Gate circuit O1l is a rounding garden that explains the following example)1&! (b) The control structure of the logic circuit, and the horizontal and vertical axes represent the two λ power supplies @ Ia and Ib injected into one logic circuit, respectively. - In figure (a), the critical value of the error current is Z
12.13 is an inductance having inductance values L1 and I4, respectively, 14.15 is an input current path into which input currents Ia and Ib are injected, 16 is an output path, and 17 is a load. resistance.

18 is a broomstick. The above inductance value - L1.14s di 177 non-critical current value lo1, Is father-in-law is LII@l-LSI Yuki ---
------(1) Its(Lt◆Lx)-do
−−−−−=−= Move so as to satisfy (2).

In the above formula, 10 #i is a natural constant called magnetic flux quantum, which is 10
7pH-mA @Oil.

传) In the control characteristic K in the figure, when there are λ force currents Ia and Ib in the region shown by the diagonal part in the figure, it will be in the 7 non-junction 10% 11 zero voltage state. ~Therefore, no output current fIL flows to the output line 16, and the wrinkle logic gate i is in the logic state. In the figure, the “area” in the diagonal part is “”
At 7/PIi 10 and 11 transition to a finite voltage state and exhibit a round shape 11, a round output current flows through the output line 111, and the scissors-gate circuit is in a 1110 state 11.

As for the control characteristics of the logic gate circuit that performs the product O logic lK, it is necessary for the logic dart to transition to the voltage state when only the input voltage 1111m or Ile is flowing. Umbrella input power aI/%Rokutaha! b a'llk, equal value O
When the input voltages wth and xh- are both in the state, it is necessary for the scissor theory layer (goo)llllII to transition to the voltage state! Input current Ia (-1%) OI
, "Ct) '81% large self (large heat suitable control 4I characteristics f 0 book discussion dirt ■ road is %2 Ojiso cefno y reward money 16slle diII dragon 7nono critical current Value O ratio I
If @/I@l is 1 and the needle is placed on the logic game in the autumn state of KIa-IbO, the input current! It can be seen that when a%xb flows together, the -i state is represented by (transition) -1, and the result is an experimental flow.

Above all, interception & gon <, □ book I gate ■ step is operation merge ν is very hot, ah-Hiro logic gate - aSS is very hot (
,l! 15 advantages: 19-IIX% high-speed operation
At the same time, it also has the following drawbacks.

The disadvantage of the above equation (2) is e**a, and the current level I
You can reduce the shaft and inductance value L1% at the same time without any problems! The drawback of the nine circuits is that it requires a large lag product to construct the OIl layer, and the inductance value and the diode value of the same layer gate are the same.

It is a human with high resonance that must be attenuated because of the rounding and high-speed operation that includes the amount of chain linkage O1l.
Furthermore, when the ζO path is transferred to the silver superconducting state, 11,
It is easy to trap stray magnetic flux, and it is easy to trap and cause malfunction due to this trapping. According to the present invention, a logic gate circuit made by current injection using the di-cefnon effect, which eliminates the above-mentioned drawbacks while maintaining 7 non-contact, 1st input- and 5jlz and 2nd t)llk
Resistance 〇-Rui and pipe-control, while-IIX connected to the second g.
H end and one end of the rattan 30 paper pile are connected, one end is grounded and 9 gs gise 7 no y II gold &! .

ms input - and said Im! Death 1 and said use paper anti-O
It is a mistake to connect the working side and make the 41st century.
&M no, current injection 1. A logical circuit can be obtained. ・The following 1. Using the present invention with an 11W tube! - The third school is an example of the present example.
B) - is - Rima, G) ■°sha is the control image @Jj
c sea and I6.11%32 respectively have a current value of 1oz, a current value of 1oz, and a current value of 1-1I@I *
7 noshi bale gold%U%m4 s 3s hiro each resistance value r9
r or 1e @ anti-duck/U is load m anti-31 with resistance value -1
The output line that ends at the end, SS, S is the input deviation amount H
a s Ik flow input -, casting &! As an example of a discussion, the G47 non-critical current value, Iop
lts@*Summer・Ik and resistance value rlq r or g should be set up using the following image adjustment formula.
・--=-(3) rl m r@-11/1!
−−−−−−−−−−(4) Out of the 3 input currents @Ia%Ib, only one input current is 1a.
* If the curve t- assumed to be injected into the ring gate circuit remains larger than the Io defined by the equation If the input current Iatt (4) formula % formula % (5) (6) is satisfied, the G-Cefnon junction 31.
32111 zero electric E type WiKlbt), output 1I36K
T! No output current flows.

Next, when an input voltage [Ib that satisfies the following relational expression is injected into the logic gate circuit, Ia A + Ib > Is −・−−−−−−−
---(ηIa + Ib > 2Io = ---
---=--・-(8) (7) 2K @ 5 Then, the G-Cefnon junction 32 transitions to the voltage state, and the input current Ia s
Ib is injected into the G-Cefnon junction s1 (8) 91. As a result, the input voltage @Ia%Ib passes through the output line U and enters the negative IIl output voltage.0 input terminal Ib becomes Ia]%gh. Logic dash circuit [Injected round pigeon house is O1 above! -de Ia
A similar explanation can be obtained by replacing Ib with Ib.

gs ■ 伽) is (2), m, m, (2) formula and Ia and I
If b is replaced and the equation IIO is used, it is possible to show the control error of the scissors logic Darto path.As can be seen from this figure, only one of the input currents Ia%IbO is flowing. Then, if there is an input current greater than or equal to SI@, the scissors logic circuit transitions to all voltage states and becomes 1%I+%.
On the other hand, 41) If equal input current Ia%Ib is flowing, 1a Ia m h m I・or more O input current value -
If it flows, the circuit transitions to the voltage state. It has a high yield as a road, and is capable of high-speed operation.Furthermore, this implementation
In the electric wire injection tumor logic data path, the critical current value, resistance plated (萄), (4) 2 shows the relative clamping type tube boiling storm (% 1st cabinet conventional example) As mentioned above, there is no relational expression that defines the absolute value of the all-path parameter O, as in the Nishi-style method, and therefore the
It is possible to make the circuit O small ◎ In addition, since rounding does not use inductance, there is no resonance phenomenon that occurs from the inductance and the capantance of the G-Cefnon junction, so it is necessary to take measures to suppress the resonance on the circuit ** 1-・Even if a superconducting loop circuit is used and a stray O1L field is trapped in a grounded box, the operation will not be affected.・This example The current injection device logic gate Kushiro is its usurious lI
) Due to its characteristics, it can be used as a current amplifier.
Figure 2 shows the pigeon house O configuration tube using this embodiment as an amplifier. In the embodiment of the irises 2 WIA, the input llll59#IC through which the input current Ib flows, has a constant current Ig flowing therethrough (0
Considering the operating margin, the current value 1g is input current lm=
00 and 1101 logic gate 1 path O rising current value 31o (1
7511 ・Therefore, the operating point expansion at that time is the second
With the control 414IK$P in the figure, it can be expressed as 41. In this state, the minimum input current Im required to cause the present logic gate 1 circuit to transition to the voltage level IK is usl. If we ignore the current that can be applied to the voltage state, the output current of the main gate is SI@X O:
1! + OB1* ” LSI5 and 1k), current 11
As shown in the first cabinet, the same am current in the conventional current injection logic gate circuit is about 6), OSS% as an amplifier, and 1llIO from the present invention. It turns out that the current injection logic dart circuit O is more stupid.In actual operation, consider the operating margin, etc.The input current IAO is 11, which is O-! IIo] was also chosen with a very hot value, ll! The operating point of this logic gate circuit in a voltage state is determined at a point corresponding to 88m42.

As mentioned above, the glue of the present invention is 177 non-effective! & layer - Kyuden msi input logic gate circuit d1 di 177
The product logic gate circuit, which is the basic gate circuit in configuring the integrated circuit, maintains a wide operating margin and high gain of 414Ik, comparable to the conventional logic logic gate circuit. Well, it's much easier to implement it with a logic dart circuit that doesn't use inductance. For this reason, above I
Il! O logic 1 gate l path is conventional O interference logic gate ■
It is a logic 1 gate circuit which also has advantages such as being able to operate with a small amount of circuit O<'b, and requiring no contrivance on the circuit to avoid resonance phenomena.

[Brief explanation of the drawing]

Figure '1Il1 is ovia to explain a conventional example of a nine-current injection logic gate circuit using the di-sefsoci effect.
Expanded circuits, 弽) indicate the control characteristics of the logic gate circuit. In the same figure (a), 10 and 11 are di-ceanon junctions, 121311 inductance, and 14.1S&! Input current path %16 is an output line, and load resistor 17 -48 is grounded. 5. In Oka m1(b), 20 performs the logic operation of the product of the gate-path. A, oh. -) No. 211 is l! (a) is a circuit diagram; (a) Control of logic gate circuit 4
It is 1. In Mll-, Tatsumi, 31 and 32 are G47 non-tawarasha, ss, sa%U 嬬薫, 36 is the output line, ν is negative*m*%88%89 is input-, 40 company-tawarasha Mooka■ (Foundation) ETp%Ate41b4! indicates the operating point when the scissor logic gate circuit is used as a current amplifier.
The slI is the Honji-〇-Shoshi Confucianism shown in the 3rd. This is a diagram showing a round pigeon house O configuration using a current injection logic gate circuit as a current amplifier. (α) (b) b Figure 3-145-

Claims (1)

[Claims] Connect the rattan 10 power line and one end of the 1st & 3rd resistor to the l110ji II- with one end grounded to the Fuson ground,
One side is grounded and the output is -
and the other end of the first resistor O and one end of the 30th resistor are connected, and one end of the third resistor is grounded.
, lM2O human power - and the other ends of the second and third resistors are connected. A current injection lid logic gate circuit using the Sefson effect