Three-state complementary field effect integrated circuit

Claim 1

A three-state complementary field effect integrated circuit comprising: an input (1); an output (2); a first control input (6) and a second control input (5) to which control signals opposite to each other are applied; a first series connection connected to said input (1) and said first and second control input (6, 5), in which first switching means (9), second switching means (7, 8) having a delay resistance and third switching means (10) are connected in this order between a power supply (Vc) and a ground (GND); an output circuit comprising a second series connection connected to said first series connection, in which a first field effect device (P1) of a certain conductivity type having a control electrode and a second field effect device (N1) of an opposite conductivity type having a control electrode are connected in series between said power supply (Vcc) and said ground (GND); wherein a node connected to said first and the second field effect devices (P1, N1) constitutes said output (2), one terminal and another terminal of said second switching means are connected respectively to said control electrodes of said first and second field effect devices (P1, N1), said second switching means turns on in response to the control signals applied to said first and second control input (6, 5) and provides said delay resistance to said first series connection in series, said first switching means (9) is coupled to said input (1) and said first control input (6), turns on in response to the input signal applied to said input (I) and applies the voltage from said power supply (Vcc) to said control electrode of said second field effect device (NI) through said second switching means (7, 8); said circuit further comprising a first capacitance (C1) connected between said control electrode of said second field effect device (N1) and a predetermined reference voltage point; wherein said first capacitance (C1) forms a first integrating circuit having a first time constant together with said delay resistance of said second switching means (7, 8), said second field effect device (N1) turns on in response to the voltage applied from said power supply (Vcc) through said first integrating circuit and having a delay determined by said first time constant, said third switching means (10) is coupled to said input (1) and said second control input (5), turns on in response to the input signal applied to said input (1) and applies the voltage from said ground (GND) to said control electrode of said first field effect device (P1) through said second switching means (7, 8); and a second capacitance (C2) connected between said control electrode of said first field effect device (Pl) and said reference voltage point, wherein said second capacitance (C2) forms a second integrating circuit having a second time constant together with said delay resistance of said second switching means (7, 8), and said first field effect device (P1) turns on in response to the voltage applied from said ground (GND) through said second integrating circuit and having a delay determined by said second time constant wherein said second switching means comprises a third series connection of a resistance connection (7) and a fourth switching means (8) having a first on resistance, said fourth switching means (8) turns on in response to the control signal applied to said first and second control inputs (6, 5) and interconnects said first on resistance with said third series connection, and said first on resistance of said fourth switching means (8) and said resistance connection (7) forming said delay resistance.