Applications of universal frequency translation
DCFirst Claim
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1. A method for communication in a telephone, comprising:
- receiving by said telephone an input signal from a communication medium;
selectively coupling the input signal to an output signal node via a switch;
down-converting the input signal at the output signal node using a capacitor coupled to the output signal node; and
coupling the capacitor between the output signal node and an electrical ground.
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Abstract
Frequency translation and applications of same are described herein. Such applications include, but are not limited to, frequency down-conversion, frequency up-conversion, enhanced signal reception, unified down-conversion and filtering, and combinations and applications of same.
865 Citations
27 Claims
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1. A method for communication in a telephone, comprising:
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receiving by said telephone an input signal from a communication medium; selectively coupling the input signal to an output signal node via a switch; down-converting the input signal at the output signal node using a capacitor coupled to the output signal node; and coupling the capacitor between the output signal node and an electrical ground. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method for communication in a telephone, comprising:
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receiving by said telephone an input signal from a communication medium; selectively coupling the input signal to an output signal node via a switch; down-converting the input signal at the output signal node using a capacitor coupled to the output signal node; and selectively opening and closing the switch according to a control signal including pulses having apertures.
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14. A method for communication in a telephone, comprising:
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receiving by said telephone an input signal from a communication medium; selectively coupling the input signal to an output signal node via a switch; down-converting the input signal at the output signal node using a capacitor coupled to the output signal node; and storing charge from the input signal at the capacitor when the switch is closed.
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15. A method for communication in a telephone, comprising:
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receiving by said telephone an input signal from a communication medium; selectively coupling the input signal to an output signal node via a switch; down-converting the input signal at the output signal node using a capacitor coupled to the output signal node; and discharging stored energy from the capacitor to the output node when the switch is open.
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16. A receiver circuit for communication in a telephone, comprising:
an interface module that receives an input signal from a communication medium, the interface module comprising a frequency down-converter comprising the following; a switch that selectively couples the input signal to an output signal node; and a capacitor coupled between the output signal node and an electrical ground to provide a down-converted signal at the output signal node. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27)
Specification