Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1989-05-24
1990-07-24
James, Andrew J.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307458, 3072721, 307546, H03K 19086, H03K 3284
Patent
active
049437410
ABSTRACT:
An emitter follower current switch circuit is provided for emitter coupled logic or current mode logic (ECL/CML) circuits having output buffer emitter follower transistor elements which source true and complementary output signals of high and low potential to respective true and complementary outputs of the ECL/CML gate. The emitter follower current switch circuit effectively disconnects the output current sink from and ECL/CML gate output and corresponding output buffer emitter follower transistor element when the corresponding output is at high potential. At each output a current switch transistor element is coupled between the respective output buffer emitter follower transistor element and the output current sink. A control circuit controls the conducting state of the current switch transistor element so that it is on (conducting) or off (non-conducting) for corresponding output signals of low and high potential respectively. Cross control circuits are provided so that the current switch transistor element for the true output is controlled by the complementary output signal potential level and the current switch transistor element for the complementary output is controlled by the true output signal potential level.
REFERENCES:
patent: 4593211 (1986-06-01), Belforte
Estrada Julio R.
Yarbrough Roy L.
James Andrew J.
Kane Daniel H.
National Semiconductor Corporation
Patch Lee
Wambach M.
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