GB1078987A - Creación de Inventos y Patentes con Inteligencia Artificial

GB1078987A – Three-state trigger circuits
– Google Patents

GB1078987A – Three-state trigger circuits
– Google Patents
Three-state trigger circuits

Info

Publication number
GB1078987A

GB1078987A
GB17973/65A
GB1797365A
GB1078987A
GB 1078987 A
GB1078987 A
GB 1078987A
GB 17973/65 A
GB17973/65 A
GB 17973/65A
GB 1797365 A
GB1797365 A
GB 1797365A
GB 1078987 A
GB1078987 A
GB 1078987A
Authority
GB
United Kingdom
Prior art keywords
transistors
outputs
input
circuit
diodes
Prior art date
1964-04-30
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)

Expired

Application number
GB17973/65A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)

Siemens Schuckertwerke AG

Siemens AG

Original Assignee
Siemens Schuckertwerke AG
Siemens AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
1964-04-30
Filing date
1965-04-28
Publication date
1967-08-09

1965-04-28
Application filed by Siemens Schuckertwerke AG, Siemens AG
filed
Critical
Siemens Schuckertwerke AG

1967-08-09
Publication of GB1078987A
publication
Critical
patent/GB1078987A/en

Status
Expired
legal-status
Critical
Current

Links

Espacenet

Global Dossier

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Classifications

H—ELECTRICITY

H03—ELECTRONIC CIRCUITRY

H03K—PULSE TECHNIQUE

H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits

H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses

H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback

H03K3/28—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback

H03K3/281—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator

H03K3/286—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback using means other than a transformer for feedback using at least two transistors so coupled that the input of one is derived from the output of another, e.g. multivibrator bistable

H03K3/2893—Bistables with hysteresis, e.g. Schmitt trigger

H03K3/2897—Bistables with hysteresis, e.g. Schmitt trigger with an input circuit of differential configuration

G—PHYSICS

G05—CONTROLLING; REGULATING

G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS

G05B11/00—Automatic controllers

G05B11/01—Automatic controllers electric

G05B11/14—Automatic controllers electric in which the output signal represents a discontinuous function of the deviation from the desired value, i.e. discontinuous controllers

G05B11/18—Multi-step controllers

Abstract

1,078,987. Three-state circuits. SIEMENSSCHUCKERTWERKE A.G. April 28, 1965 [April 30, 1964], No. 17973/65. Heading H3T. [Also in Division H2] A circuit capable of assuming one of three states depending on the value of an input voltage comprises two stages p5 and p6 having supply voltages N and P respectively, and driven by an input signal X w through stages p3 and p4; the latter drives p5 directly and p6 through a Zener diode (or equivalent) n1, and positive feedback is taken from a voltage divider point C to the input. Transistors p5 and p6 are initially conducting so that the potentials at U and U1 are close to zero (i.e. point M). If the input potential X w exceeds a certain value in either the positive or negative direction, conduction of either p5 or p6 will fall, and the positive feedback will make this cumulative so that either p5 or p6 will be cut off, and one of the output terminals U will assume the potential of the line N. The input potential is applied to an emitter-coupled pair p1 and p2 to compensate for threshold values of the transistors and their temperature dependence. The positive feedback needed for the relaxation operation is applied from point C to the base of p2. Stabilization of the response boundaries is achieved by negative feedback from the output of p4 via resistor r8 to the base of p2. When used in a servo system, a differential component can be included by additional negative feedback from point D to the base of p1 with a time-constant determined by r30 and k2. The circuit is initially balanced by r0 so that with the input shorted the potentials of A and B are equidistant from M in opposite directions. Diodes n2 and n3 provide a threshold voltage which must be overcome before p5 and p6 can be cut off; when these diodes conduct they effectively short the base/emitter paths of the transistors and reduce their conduction, thus initiating the relaxation operation which proceeds as a result of the positive feedback along line RK. The phase-reversing stage p7 can be omitted if the outputs U need not be of the same sign, U1 then becoming equal to P in one state. To avoid undesired operation of the circuit by short-duration changes in X w the voltage at the junction of r10 and r11 is tapped off, integrated (Fig. 3, not shown) and applied to another relaxation circuit of the same type as Fig. 2 whose outputs U are fed to a NOR circuit. The NOR output is applied to terminal F of Fig. 2 to inhibit relaxation of the circuit until the integrator has reached its limiting value when the signal at F falls to zero. For operating an A.C. servo motor (Fig. 4, not shown) the U outputs are both applied in parallel through diodes to transistors which also receive two square wave signals in antiphase. When the input X w is less than the threshold value both U outputs are zero and the transistor inputs are short-circuited. When X w goes outside the predetermined range in either direction one of the U outputs goes negative, the corresponding diodes are cut off and the transistors conduct alternately on the two half-cycles of one of the square-wave signals. The phase of the signals supplied to the motor by the transistors depends on which phase of the square-wave signals is passed by which transistor, and this depends on which of the U outputs has gone negative.

GB17973/65A
1964-04-30
1965-04-28
Three-state trigger circuits

Expired

GB1078987A
(en)

Applications Claiming Priority (1)

Application Number
Priority Date
Filing Date
Title

DES90861A

DE1280309B
(en)

1964-04-30
1964-04-30

Tilting stage with three stable states

Publications (1)

Publication Number
Publication Date

GB1078987A
true

GB1078987A
(en)

1967-08-09

Family
ID=7516126
Family Applications (1)

Application Number
Title
Priority Date
Filing Date

GB17973/65A
Expired

GB1078987A
(en)

1964-04-30
1965-04-28
Three-state trigger circuits

Country Status (5)

Country
Link

US
(1)

US3379900A
(en)

DE
(1)

DE1280309B
(en)

FR
(1)

FR1424634A
(en)

GB
(1)

GB1078987A
(en)

NL
(1)

NL6500650A
(en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

US3492496A
(en)

1966-12-12
1970-01-27
Hughes Aircraft Co
Tristable multivibrator

FR2077951B1
(en)

1970-02-26
1973-10-19
Werkzeugmasch Heckert Veb

Family Cites Families (1)

* Cited by examiner, † Cited by third party

Publication number
Priority date
Publication date
Assignee
Title

DE1094303B
(en)

1959-09-25
1960-12-08
Siemens Ag

Electronic switch with three and four stable positions

1964

1964-04-30
DE
DES90861A
patent/DE1280309B/en
active
Pending

1965

1965-01-19
NL
NL6500650A
patent/NL6500650A/xx
unknown

1965-01-25
FR
FR3212A
patent/FR1424634A/en
not_active
Expired

1965-04-28
US
US451555A
patent/US3379900A/en
not_active
Expired – Lifetime

1965-04-28
GB
GB17973/65A
patent/GB1078987A/en
not_active
Expired

Also Published As

Publication number
Publication date

DE1280309B
(en)

1968-10-17

FR1424634A
(en)

1966-01-14

NL6500650A
(en)

1965-11-01

US3379900A
(en)

1968-04-23

Información de contacto