Multiplex communications – Communication techniques for information carried in plural... – Combining or distributing information via time channels
Patent
1995-12-20
1998-10-20
Hsu, Alpus H.
Multiplex communications
Communication techniques for information carried in plural...
Combining or distributing information via time channels
370532, H04J 302
Patent
active
058257810
ABSTRACT:
A tone generating circuit comprises a counter circuit having a clock input for receiving a clock signal and a plurality of outputs which generate sequential binary values in response to transitioning of the clock signal; a multiplexer having several inputs, a number of select lines connected to the counter circuit outputs, and at least one output; and a resistor divider network connected to the multiplexer inputs. The multiplexer select lines select one of the multiplexer inputs in accordance with the binary value received from the counter circuit. The multiplexer inputs are connected to different taps on the resistor divider network. The counter selects multiplexer inputs on the falling edge of the clock signal, while the output signal level transitions before the rising edge of the clock signal.
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Davis Jeffery M.
Gadsby Winston M.
Hsu Alpus H.
Hubbell, Inc.
Longanecker Stacey J.
Presson Jerry M.
Yao Kwang B.
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