A learning method for synapses of a neuromorphic device may include generating and inputting, by a pre-synaptic neuron, a first pre-synaptic pulse to a plurality of synapses at a first start time, the plurality of synapses being coupled to the pre-synaptic neuron; generating and inputting, by a first post-synaptic neuron, a first post-synaptic pulse to a first synapse of the plurality of synapses at a first delayed time that is delayed by a first delay amount from the first start time, the first synapse being coupled to the first post-synaptic neuron; and generating and inputting, by a second post-synaptic neuron, a second post-synaptic pulse to a second synapse of the plurality of synapses at a second delayed time that is delayed by a second delay amount from the first start time, the second synapse being coupled to the second post-synaptic neuron.
Please help me write a proper abstract based on the patent claims. CLAIM: 1. A learning method for synapses of a neuromorphic device, the method comprising: generating and inputting, by a pre-synaptic neuron, a first pre-synaptic pulse to a plurality of synapses at a first start time, the plurality of synapses being coupled to the pre-synaptic neuron; generating and inputting, by a first post-synaptic neuron, a first post-synaptic pulse to a first synapse of the plurality of synapses at a first delayed time that is delayed by a first delay amount from the first start time, the first synapse being coupled to the first post-synaptic neuron; and generating and inputting, by a second post-synaptic neuron, a second post-synaptic pulse to a second synapse of the plurality of synapses at a second delayed time that is delayed by a second delay amount from the first start time, the second synapse being coupled to the second post-synaptic neuron. 2. The learning method of claim 1, further comprising generating and inputting, by a third post-synaptic neuron, a third post-synaptic pulse to a third synapse of the plurality of synapses at a third delayed time, the third synapse being coupled to the third post-synaptic neuron. 3. The learning method of claim 2, further comprising generating and inputting, by a fourth post-synaptic neuron, a fourth post-synaptic pulse to a fourth synapse of the plurality of synapses at a fourth delayed time, the fourth synapse being coupled to the fourth post-synaptic neuron. 4. The learning method of claim 1, further comprising: generating and inputting, by the pre-synaptic neuron, a second pre-synaptic pulse to the plurality of synapses at a second start time; generating and inputting, by the second post-synaptic neuron, the first post-synaptic pulse to the second synapse at a first delayed time that is delayed by the first delay amount from the second start time; and generating and inputting, the first post-synaptic neuron, the second post-synaptic pulse to the first synapse at a second delayed time that is delayed by the second delay amount from the second start time. 5. The learning method of claim 1, wherein the first synapse is disposed at an intersection between a row line and a first column line, and the second synapse is disposed at an intersection between the row line and a second column line, the row line extending from the pre-synaptic neuron, the first and second column lines extending from the first and second post-synaptic neurons, respectively. 6. The learning method of claim 1, wherein the first and second delay amounts are adjusted by a timing controller electrically connected to the first and second post-synaptic neurons. 7. The learning method of claim 1, wherein the first pre-synaptic pulse overlaps the first post-synaptic pulse by a first duty time, and wherein the first pre-synaptic pulse overlaps the second post-synaptic pulse by a second duty time. 8. The learning method of claim 7, wherein the first duty time is longer than the second duty time. 9. The learning method of claim 1, wherein the first pre-synaptic pulse has a first polarity, and wherein the first and second post-synaptic pulses have a second polarity. 10. A learning method for synapses of a neuromorphic device, the method comprising: generating and inputting, by a pre-synaptic neuron, a first pre-synaptic pulse to first to fourth synapses at a first start time, during a first cycle, the first to fourth synapses being electrically connected to the pre-synaptic neuron; generating and inputting, by a first post-synaptic neuron, a first post-synaptic pulse to the first synapse at a first delayed time that is delayed from the first start time; generating and inputting, by a second post-synaptic neuron, a second post-synaptic pulse to the second synapse at a second delayed time that is delayed from the first delayed time; generating and inputting, by a third post-synaptic neuron, a third post-synaptic pulse to the third synapse at a third delayed time that is delayed from the second delayed time; and generating and inputting, by a fourth post-synaptic neuron, a fourth post-synaptic pulse to the fourth synapse at a fourth delayed time that is delayed from the third delayed time. 11. The learning method of claim 10, further comprising: generating and inputting, by the pre-synaptic neuron, a second pre-synaptic pulse to the first to fourth synapses at a second start time, during a second cycle; generating and inputting, by the second post-synaptic neuron, a fifth post-synaptic pulse to the second synapse at a fifth delayed time that is delayed from the second start time; generating and inputting, by the third post-synaptic neuron, a sixth post-synaptic pulse to the third synapse at a sixth delayed time that is delayed from the fifth delayed time; generating and inputting, by the fourth post-synaptic neuron, a seventh post-synaptic pulse to the fourth synapse at a seventh delayed time that is delayed from the sixth delayed time; and generating and inputting, by the first post-synaptic neuron, an eighth post-synaptic pulse to the first synapse at an eighth delayed time that is delayed from the seventh delayed time. 12. The learning method of claim 11, further comprising: generating and inputting, by the pre-synaptic neuron, a third pre-synaptic pulse to the first and fourth synapses at a third start time during a third cycle; generating and inputting, by the third post-synaptic neuron, a ninth post-synaptic pulse to the third synapse at a ninth delayed time that is delayed from the third start time; generating and inputting, by the fourth post-synaptic neuron, a tenth post-synaptic pulse to the fourth synapse at a tenth delayed time that is delayed from the ninth delayed time; generating and inputting, by the first post-synaptic neuron, an eleventh post-synaptic pulse to the first synapse at an eleventh delayed time that is delayed from the tenth delayed time; and generating and inputting, by the second post-synaptic neuron, a twelfth post-synaptic pulse to the second synapse at a twelfth delayed time that is delayed from the eleventh delayed time. 13. The learning method of claim 12, further comprising: generating and inputting, by the pre-synaptic neuron, a fourth pre-synaptic pulse to the first to fourth synapses at a fourth start time during a fourth cycle; generating and inputting, by the fourth post-synaptic neuron, a thirteenth post-synaptic pulse to the fourth synapse at a thirteenth delayed time that is delayed from the fourth start time; generating and inputting, by the first post-synaptic neuron, a fourteenth post-synaptic pulse to the first synapse at a fourteenth delayed time that is delayed from the thirteenth delayed time; generating and inputting, by the second post-synaptic neuron, a fifteenth post-synaptic pulse to the second synapse at a fifteenth delayed time that is delayed from the fourteenth delayed time; and generating and inputting, by the third post-synaptic neuron, a sixteenth post-synaptic pulse to the third synapse at a sixteenth delayed time that is delayed from the fifteenth delayed time. 14. The learning method of claim 10, wherein the first to fourth delayed times are adjusted by a timing controller which is electrically connected to the first to fourth post-synaptic neurons. 15. A learning method for synapses of a neuromorphic device, the method comprising: generating and inputting, by a first pre-synaptic neuron, a first pre-synaptic pulse to a plurality of synapses at a start time, the plurality of synapses being electrically connected to the first pre-synaptic neuron; generating and inputting, by a first post-synaptic neuron bundle having a plurality of first post-synaptic neurons, a plurality of first post-synaptic pulses to first synapses among the plurality of synapses at a first delayed time, the first synapses being electrically connected to the first post-synaptic neuron bundle; and generating and inputting, by a second post-synaptic neuron bundle having a plurality of second post-synaptic neurons, a plurality of second post-synaptic pulses to second synapses among the plurality of synapses at a second delayed time, the second synapses being electrically connected to the second post-synaptic neuron bundle. 16. The learning method of claim 15, further comprising generating and inputting, by a third post-synaptic neuron bundle having a plurality of third post-synaptic neurons, a plurality of third post-synaptic pulses to third synapses among the plurality of synapses at a third delayed time, the third synapses being electrically connected to the third post-synaptic neuron bundle. 17. The learning method of claim 16, further comprising generating and inputting, by a fourth post-synaptic neuron bundle having a plurality of fourth post-synaptic neurons, a plurality of fourth post-synaptic pulses to fourth synapses among the plurality of synapses at a fourth delayed time, the fourth synapses being electrically connected to the fourth post-synaptic neuron bundle. 18. The learning method of claim 17, wherein the first delayed time is delayed by a first delay amount from the start time, wherein the second delayed time is delayed by a second delay amount from the first delayed time, wherein the third delayed time is delayed by a third delay amount from the second delayed time, and wherein the fourth delayed time is delayed by a fourth delay amount from the third delayed time. 19. The learning method of claim 18, wherein the first to fourth delay amounts have the same length.