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AssigneeAshvattha Semiconductor, Inc.
InventorsGuruswami M. Sridharan, Kartik M. Sridharan
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A method for generating a plurality of frequencies having predetermined frequency deviations from a phase lock loop device including a VCO having a main voltage input, a modulation voltage input and a frequency output, a first and second feedback loop digital divider, each having an input and an output, a phase frequency detector having a first and second input and an output, a reference frequency generator such as a crystal oscillator having an output, a first and second reference frequency digital divider, each having an input and an output, a loop filter having an input and an output, a switch having an input and a first and a second switched output, a hold circuit having an input and an output, a memory circuit for storing the a lock voltage and the corresponding loop output frequency, the steps including; setting a first initial predetermined value of the first feedback loop digital divider, connecting a switch output to the main input of the VCO, supplying a first predetermined reference frequency to the phase frequency divider, supplying a loop correction voltage Vr, to a main drive input of a VCO, allowing the phase lock loop to lock, switching the switch output to the modulation input of the VCO, changing the initial predetermined value of the first feedback loop digital divider, supplying a second loop correction voltage Vj, allowing the phase lock loop to lock, storing the new lock voltage in a memory circuit.
A method for generating a plurality of frequencies having predetermined frequency deviations from a phase lock loop device including a VCO having a main voltage input, a modulation voltage input and a frequency output, a first and second feedback loop digital divider, each having an input and an output, a phase frequency detector having a first and second input and an output, a reference frequency generator such as a crystal oscillator having an output, a first and second reference frequency digital divider, each having an input and an output, a loop filter having an input and an output, a switch having an input and a first and a second switched output, a hold circuit having an input and an output, a memory circuit for storing the main voltage input and the corresponding loop output frequency, the steps including;
A frequency generation device for generating a plurality of frequencies having predetermined frequency deviation comprising:
Dependencies are inferred from the claim text.