Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1991-08-22
1993-10-12
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307471, 328127, 328133, H03K 526, H03K 906
Patent
active
052528650
ABSTRACT:
An integrating phase detector includes a phase comparator and an integrating load impedance. The phase comparator is a voltage-input, current-output logic gate such as a OR/NOR gate, or a XOR/XNOR gate having first and second inputs for comparing the phase of first and second input signals. The current output of the logic gate provides an output current pulse proportional to the phase difference between the first and second input signals. The integrating load such as a passive resistor-capacitor network is coupled to the current output of the phase detector for directly integrating the current pulse and providing a DC voltage proportional to the phase difference between the first and second input signals. The minimum pulse width of the output current pulse is substantially limited only by the fT of the devices used in the logic gate. The improved bandwidth of the phase detector also increases the linear operating range by increasing the range of phase in which the output current pulse is proportional to the input phase difference.
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IEEE Transactions on Electron Devices, vol. 32, No. 6, Jun. 1985, New York US pp. 1114-1118 Shiichi Katsu et al. "A Source Coupled FET Logic--A New Current-Mode Approach to GaAs Logics".
Davenport William H.
McCormack Gary D.
Callahan Timothy P.
Triquint Semiconductor, Inc.
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