Time frame synchronization of medical monitoring signals
First Claim
1. A time frame synchronization circuit for providing time frame synchronization of a first signal with a periodic bus cycle clock signal, comprising:
- (a) a means for receiving a first signal;
(b) a means for receiving a periodic bus cycle clock signal;
(c) a phase lock loop circuit for generating a local synchronization circuit clock signal synchronized with the periodic bus cycle clock signal; and
(d) means for generating a multi-bit time frame synchronized signal indicating a segment of a bus cycle of the periodic bus cycle clock signal during which the first signal occurs using the first signal and the local synchronization circuit clock signal.
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Abstract
The present invention provides a system and method for establishing a synchronized time frame for signals in a medical monitoring system. In particular, the present invention provides a system and method for synchronizing the time frame of stimulation signals provided by a stimulator to a subject and response signals received by an amplifier device from the subject in response thereto. Thus, the present invention allows accurate display and analysis of the relationship between stimulation and response signals by a monitoring device. Time frame synchronization of stimulus and response signals is achieved using a periodic bus cycle clock signal which is provided by a bus, i.e., an IEEE 1394 bus, connecting together each of the devices in the monitoring system. For example, a time frame synchronized stimulation trigger signal may be generated by a stimulus synchronization circuit including a phase-locked loop for providing a local clock signal synchronized to the periodic bus cycle clock signal, and employing the local clock signal to provide a multi-bit signal indicating a segment during a bus cycle during which the stimulation signal is provided by the stimulator to the subject.
29 Citations
10 Claims
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1. A time frame synchronization circuit for providing time frame synchronization of a first signal with a periodic bus cycle clock signal, comprising:
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(a) a means for receiving a first signal;
(b) a means for receiving a periodic bus cycle clock signal;
(c) a phase lock loop circuit for generating a local synchronization circuit clock signal synchronized with the periodic bus cycle clock signal; and
(d) means for generating a multi-bit time frame synchronized signal indicating a segment of a bus cycle of the periodic bus cycle clock signal during which the first signal occurs using the first signal and the local synchronization circuit clock signal. - View Dependent Claims (2, 3, 4, 5)
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6. A method of providing time frame synchronization of a first signal with a periodic bus cycle clock signal, comprising the steps of:
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(a) receiving a first signal;
(b) receiving a periodic bus cycle clock signal;
(c) generating a local synchronization clock signal synchronized with the periodic bus cycle clock signal; and
(d) generating a multi-bit time frame synchronized signal indicating a segment of a bus cycle of the periodic bus cycle clock signal during which the first signal occurs using the first signal and the local synchronization circuit clock signal. - View Dependent Claims (7, 8, 9, 10)
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Specification