GB1199150A - Integrator Circuit - Google Patents

Abstract

1,199,150. Integrator circuits. COURTAULDS Ltd. 8 Dec., 1967 [8 Dec., 1966], No. 55024/66. Heading G4G. [Also in Division H3] An integrator for generating a voltage signal charging at a constant rate for a period immediately succeeding a period of constant value, without a transitional voltage step (Fig. 2, not shown) comprises amplifier A 1 with negative feedback over resistor R 1 and capacitor C 1 to first input 2, with output 1 connected to input 3 of amplifier A 2 whose input 6 receives a preset voltage from potentiometer RV 1 and whose output 4 is connected over resistance R 2 and relay contacts L 1 to capacitor C 2 and second input 5 of A 1 . First input 2 of A 1 is connected over resistance R 4 and relay contacts M 1 , N 1 to earth; and over resistor R 3 and relay contacts L 2 to earth; all relay contacts shown de-energized at which output voltage Eg remains constant and held equal to E 2 , due to the charge on C 2 and feedback over the closed loop comprising A 1 , A 2 . On relay operation to open L 1 , L 2 , the loop is broken but Eg remains constant due to charge on C 2 and the earth connection of input 2 of A 1 . Subsequently, relay operation changes over N 1 and the output E 0 varies linearly until on relay operation to open M 1 , Eg is held at the assumed value, or until all relays are de-energized to return the contacts, when it reverts to E 2 . The output is applicable to control the lateral movement of a clamp in the tensile testing of yarn Specification 1,199,149.