Patents by Inventor Frank Muting

Frank Muting has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Hybrid circuit
    Patent number: 4301336
    Abstract: Hybrid circuit for transition between two-wire and four-wire lines includes first and second operational amplifiers each having an inverted and non-inverted input and output, a voltage divider connected to each of the inverted inputs, a bidirectional terminal connecting the two-wire side to the non-inverted input of the first amplifier and a transmit terminal connecting the four-wire side to the non-inverted input of the second amplifier, to feed audio voltage to the non-inverted inputs, the voltage dividers having equal resistances, a receive terminal for connecting the four-wire side to the output of the first amplifier, matching impedances connected to the non-inverted input of the second amplifier and the output of the first amplifier, the matching impedances and an impedance balancing the impedance of the two-wire side compared to input impedances to the hybrid circuit being such that, for an incoming transmission, half of the output voltage of the second amplifier is at the non-inverted input of the fir
    Type: Grant
    Filed: April 16, 1979
    Date of Patent: November 17, 1981
    Assignee: Deutsche Telephonwerke und Kabelindustrie Aktiengesellschaft
    Inventor: Frank Muting