Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-08-28
1991-10-01
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
307443, 3072721, 3072471, 328111, 328158, H03B 1900, G06G 700
Patent
active
050536516
ABSTRACT:
A digital mixer employs a plurality of flip-flops to mix two digital input signals and provide a beat frequency output. The first input signal is provided as a clock signal to a first D flip-flop and to a third JK flip-flop. The second input signal is provided as a clock signal to a second D flip-flop. The inverted output of the first flip-flop is provided as a clock input to a fourth JK flip-flop. The non-inverted and inverted outputs of the second flip-flop are connected, respectively, to the J and K inputs of the third flip-flop. The non-inverted outputs of the second and third flip-flops are input to a first AND gate, the output of which connects to the J input of the fourth flip-flop. Likewise, the inverted outputs of the second and third flip-flops are input to a second AND gate, the output of which connects to the K input of the fourth flip-flop. The non-inverted output of the fourth flip-flop provides a beat frequency that is one-half the difference frequency of the two input signals. The third flip-flop in the digital mixer prevents glitches around the transition time of the beat frequency output even for very low beat frequencies.
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Berquist Roy W.
Frerking Marvin E.
Callahan Timothy P.
Hamann H. Fredrick
Horn John J.
McFarren John C.
Rockwell International Corporation
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