Patent ID: 11933919
Assignee: MIXED-SIGNAL DEVICES INC.
Field: Measurement (Instruments)
Classification: CPC G  H | IPC G  H

Claim 0:
1. A direct frequency synthesizer comprising:
a high speed bulk acoustic wave (BAW) resonator configured to generate a frequency signal;
a BAW oscillator capable of receiving the frequency signal and configured to generate an output BAW clock signal (BAW CLK);
a frequency and phase estimation circuit capable of receiving a reference clock signal from a reference clock (REF CLK) and the BAW CLK, where the frequency and phase estimation circuit is configured to generate a frequency error signal and a phase error signal;
a frequency chirp generator capable of receiving chirp parameters, and a chirp sync signal, where the frequency chirp generator is configured to generate a sequence of nominal frequency control word (FCW);
a frequency control word (FCW) generator that is capable of receiving an input FCW from the frequency chirp generator, and the phase error signal and the frequency error signal from the frequency and phase estimation circuit, where the FCW generator is configured to generate a corrected FCW based upon the input FCW, the phase error signal and the frequency error signal;
a direct digital frequency synthesizer capable of receiving the BAW CLK and the corrected FCW, where the direct digital frequency synthesizer is configured to generate a codeword based upon the BAW CLK and the corrected FCW; and
a high speed digital to analog converter (HS DAC) capable of receiving the BAW CLK and the codeword, where the HS DAC is configured to synthesize an analog signal.