Method of generating in-phase and quadrature-phase clock signals
AssigneeQUALCOMM Incorporated
InventorsYongjian Tang, Xiaohua Kong
Life of this patent
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Abstract
A clock signal generator, including: an in-phase clock generating circuit, comprising: an inverter configured to invert an input clock signal to generate a substantially square wave voltage; and a first transimpedance amplifier (TIA) configured to generate an in-phase clock signal based on the substantially square wave voltage; and a quadrature-phase clock generating circuit comprising: a load capacitor; a switched integrator configured to integrate the input clock signal to generate a substantially triangular wave voltage across the load capacitor; and a second transimpedance amplifier (TIA) configured to generate a quadrature-phase clock signal based on the substantially triangular wave voltage.
Claims20
A clock signal generator, comprising:
- an in-phase clock generating circuit, comprising:
- an inverter configured to invert an input clock signal to generate a substantially square wave voltage;
- and
- a first transimpedance amplifier (TIA) configured to generate an in-phase clock signal based on the substantially square wave voltage;
- and
- a quadrature-phase clock generating circuit comprising:
- a load capacitor;
- a switched integrator configured to integrate the input clock signal to generate a substantially triangular wave voltage across the load capacitor;
- and
- a second transimpedance amplifier (TIA) configured to generate a quadrature-phase clock signal based on the substantially triangular wave voltage.
A method of generating quadrature clock signals, comprising:
- inverting an input clock signal to generate an in-phase clock signal;
- integrating the input clock signal to generate a triangular wave voltage;
- and
- converting the triangular wave voltage into a square wave to generate a quadrature-phase clock signal.
Dependencies are inferred from the claim text.