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    • 1. 发明专利
    • VOLTAGE LEVEL CHANGING CIRCUITS
    • GB1473469A
    • 1977-05-11
    • GB2159875
    • 1975-05-20
    • IBM
    • H03K19/0185H03K1/10
    • 1473469 Transistor level shifting circuits INTERNATIONAL BUSINESS MACHINES CORP 20 May 1975 [5 Aug 1974] 21598/75 Heading H3T In a circuit for producing an output signal of one or other of two output levels depending on the level of an input signal, a complementary pair of output FET's T7, T8 are connected in series across supply terminals and have their common junction connected to the output, a further complementary pair of FET's T5, T6 connected across the supply terminals and having their common junction connected to the gates of the output FET's T7, T8, and two complementary input FET's T1, T2 connected between an input terminal 1 and the gates of the FET's T5, T6. The gates of the additional FET's T1, T2 are connected to the output. When a substantial change in the input occurs, the appropriate one of the input FET's T1 or T2 is turned on so as to change the state of the latch comprising FET's T3 ... T6 and hence of the output. The change in output is fed back to the input FET T1 or T2 so that further change in output (e.g. due to noise) is inhibited by the large substrate reverse bias on T1 or T2.
    • 10. 发明专利
    • SAW TOOTH GENERATORS
    • GB1372856A
    • 1974-11-06
    • GB5768971
    • 1971-12-11
    • MATSUSHITA ELECTRIC IND CO LTD
    • H03K4/71H03K4/72H03K1/10H03K4/76
    • 1372856 Vertical deflection circuits MATSUSHITA ELECTRIC INDUSTRIAL CO Ltd 11 Dec 1971 57689/71 Heading H3T A vertical deflection circuit of the type comprising an integrator reset by a switching circuit and in which the switching circuit is operated by a narrow pulse from an oscillator synchronized by synchronizing pulses, positive feedback in the deflection circuit provides a pulse which maintains the switching circuit operated throughout the flyback period so that jitter due to variation in pulse width from the oscillator is avoided. The Figure shows a Miller integrator comprising transistors 55-59 and a feedback capacitance 63, 64, the integrator being charged through a resistor 73 and discharged through a transistor 53 in response to a synchronizing pulse received from an oscillator 52 via an isolating diode 54. Lineaity is improved by resistors 66 and 67 and a capacitor 68 prevents oscillation. A positive feedback pulse derived from the differentiating and attenuating circuit 41-44 maintains the switching transistor 5 conductive throughout the flyback. A capacitor 62 tunes the deflection coils.