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US 8,078,122 B2Granted
Interface between digital and analog circuits
AssigneeQUALCOMM Incorporated
InventorsGurkanwal Sahota, Mehdi H. Sani, Sassan Shahrokhinia
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AssigneeQUALCOMM Incorporated
InventorsGurkanwal Sahota, Mehdi H. Sani, Sassan Shahrokhinia
Estimating the term…
Circuitry that generates an interface signal between a first and a second integrated circuit (IC). The circuitry includes a reference circuit that provides a reference signal, an interface circuit, and a circuit element. The interface circuit is implemented on the first IC, operatively couples to the reference circuit, receives the reference signal and a data input, and generates the interface signal. The circuit element is implemented on the second IC, operatively couples to the control circuit, receives the interface signal, and provides an output signal. The reference signal can be a voltage or a current signal, and can be generated in the first or second IC. The interface circuit can be implemented with a current mirror coupled to a switch array, and can be oversampled to ease the filtering requirement. The interface signal can be a differential current signal having multiple (e.g., four, eight, or more) bits of resolution. The circuit element can be, for example, a VGA, a modulator, or other circuits.
A device comprising:
A device comprising:
An analog integrated circuit (IC) adapted for use in a transmit signal path of a communication device, and responsive to an input differential current signal generated externally as a function of a reference signal and a digital data input, the analog IC being coupled to a reference circuit for generating the reference signal, and comprising a circuit element for generating an output signal on the basis of the differential current signal
A device comprising:
Dependencies are inferred from the claim text.