Electrical transmission or interconnection systems – Nonlinear reactor systems – Parametrons
Patent
1990-07-19
1991-07-09
Callahan, Timothy P.
Electrical transmission or interconnection systems
Nonlinear reactor systems
Parametrons
328167, 328151, 330 9, H03B 100, H03K 500
Patent
active
050308580
ABSTRACT:
A noise prevention circuit of a digital audio circuit having an input side and an output side includes a signal level retention circuit having first and second inputs and first and second outputs, for retaining a level of a transmitted signal; and a switch circuit operably coupled to the signal level retention circuit for respectively connecting the first and second inputs of the retention circuit to an active line and a ground line of the input side of the digital audio circuit. The retention circuit receives and retains input signal from the active line and the ground line of the input side of the digital audio circuit, and for alternatively connecting an active line and a ground line of the output side of the digital audio circuit. The retention circuit outputs the retained signal in the signal level retention circuit from the first and second outputs of the signal level retention circuit to the active line and the ground line of the output side of the digital audio circuit. The signal level retention circuit separates the active line from the ground line of the input side of the audio circuit, and separates the active line from the ground line of the output side of the digital audio circuit.
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Allstot et al., "MOS Switched Capacitor Ladder Filters", IEEE Journal of SSC, vol. SC-13, No. 6, Dec. 1978, pp. 806-814.
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Mavor, "A Prototype Switched-Cap. Voltage-Wave filter Realized in NMOS Technology", IEEE SSC, vol. SC-16, No. 6, 12/81.
Callahan Timothy P.
Shin-Shirasuna Electric Corp.
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