Patent ID: 8200320

Claim:
A physiologic monitoring system including a physiologic monitoring application-specific integrated circuit, the integrated circuit comprising: amplification and filtering circuitry integrated on a semiconductor substrate, for amplifying and filtering a set of electrical signals received from a first set of physiologic sensors to generate a first set of filtered electrical signals, the amplification and filtering circuitry comprising analog filtering circuitry for filtering the set of electrical signals received from the first set of physiologic sensors, wherein the first set of physiologic sensors is a set of electrocardiogram sensors, and wherein the set of electrical signals received from the first set of physiologic sensors is a set of electrocardiogram electrical signals; a real-time clock integrated on the semiconductor substrate, the real-time clock comprising a divider chain configured to frequency-divide a base timing signal to generate a real-time clock tick, wherein a frequency of signals generated by the real-time clock is within a frequency range of electrocardiogram electrical signals processed by the amplification and filtering circuitry; and digital control logic integrated on the semiconductor substrate and connected to the real-time clock and the amplification and filtering circuitry; the digital control logic being configured to receive a first set of digital physiologic data derived from the first set of filtered electrical signals, receive a second set of digital physiologic data, wherein the second set of physiologic data includes physiologic data sampled with a different sampling rate than the first set of digital physiologic data, generate a time-stamped physiologic data packet from a real-time indicator, the first set of digital physiologic data and the second set of digital physiologic data, wherein the real-time indicator is generated according to the real-time clock tick; and transmit the physiologic data packet for storage in a digital memory.