Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-10-17
1993-06-01
Westin, Edward P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307451, 307548, 307579, H03K 1716, H03K 1990
Patent
active
052162923
ABSTRACT:
In order to obtain an output circuit having pullup resistance which feeds no through current to a CMOS inverter even if output impedance of a front stage circuit is in an extremely high state, an input end and an output end of an inverter (G1) are connected to an input terminal (P.sub.i) and a first input end of an AND gate (G5) respectively. A pulse generation circuit (SG) and a gate of a pullup transistor (Q.sub.1) are connected to a second input end and an output end of the AND gate (G5) respectively. The pullup transistor (Q.sub.1) has a drain and a source which are connected to the input terminal (P.sub.i) and a power source (V.sub.DD) respectively. An input end of a CMOS inverter (11) is connected to the input terminal (P.sub.i). Even if the front stage output impedance is extremely increased after the potential of the input terminal (P.sub.i) has been at a low logical level, the pullup transistor (Q.sub.1) is quickly driven by pulses generated by the pulse generation circuit (SG), to increase the potential of the input end of the inverter (11).
REFERENCES:
patent: 4553045 (1985-11-01), Murotani
patent: 4612466 (1986-09-01), Stewart
patent: 4785203 (1988-11-01), Nakamura
patent: 4961010 (1990-10-01), Davis
patent: 5036222 (1991-07-01), Davis
patent: 5057711 (1991-10-01), Lee et al.
Imazu Taiji
Matsumoto Satoshi
Nishitani Kazuharu
Takiguchi Masao
Mitsubishi Denki & Kabushiki Kaisha
Sanders Andrew
Westin Edward P.
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