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US 8,543,068 B2Granted
Pulse coupled oscillator synchronization for wireless communications
AssigneeCornell University
InventorsXiao Y. Wang, Alyssa B. Apsel
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Abstract
A transceiver node includes a pulse coupled oscillator in an integrated circuit, which can synchronize with other nodes to generate a global clock subsequently used to facilitate synchronous communications between individual nodes. Known potential uses include a low power sensor node radio for an ad-hoc network for military applications and medical applications such as ingestible and implantable radios, self powered radios, and medical monitoring systems such as cardiac and neural monitoring patches.
Claims17
A transceiver, comprising:
- one or more integrated circuits including
- an R.F front end adapted for connection to an antenna,
- a pulse detector coupled to the R.F. front end and adapted for detecting received pulses intended for the transceiver, and
- a pulse coupled oscillator including a monotonically increasing state function that is concave downward, wherein the oscillator is adapted for receiving synchronizing pulses from the pulse detector and for causing a predetermined incremental increase in the state function in response to received synchronizing pulses.
1 more element
A wireless network, comprising:
- a plurality of nodes with each node including a respective pulse coupled oscillator implemented in a semiconductor circuit and having a monotonically increasing state function that is concave downward, wherein each oscillator is adapted to generate a change of state pulse at the end of a state function cycle;
- and transmit/receive circuitry located in each node and adapted for transmitting change of state pulses from each respective oscillator to other nodes in the network, and further adapted for receiving change of state pulses from other nodes in the network and applying them to the respective oscillator to cause an incremental increase in the state function in the respective oscillator.
Dependencies are inferred from the claim text.