Abstract: An training collar for conditioning the behavior of an animal employs a radio transmitter in conjunction with a microprocessor-based receiver unit mounted on the collar to provide enhanced control over the level of electrical stimulation delivered to the animal through collar mounted electrodes. The transmitter generates control signals including a stimulation level code, and a detector in the receiver unit extracts the stimulation level codes from the control signal and couples them to the microprocessor. The microprocessor implements a control program to generate trains of voltage pulses having widths determined by the stimulation level code. The generated train of voltage pulses control current flow in a transformer based power delivery circuit to generate voltage pulses at the collar electrodes having peak to peak voltages determined by the widths of the voltage pulses in the generated voltage pulse train.

Abstract: A bus system uses separate clocks for arbitration and data transfer. The arbitration clock signal is used for synchronizing bus request and grant events, and the data clock signal is used for synchronizing data transmission and reception. In particular, the data clock signal, which is generated by a bus master node without any temporal relationship to the arbitration clock signal, is transmitted by the bus master node through the bus to a slave node, where the received data signal is synchronized with the data clock signal transmitted therewith.