Electrical stimulation for a functional electrical stimulation system

A method for generating a stimulation signal for a functional electrical stimulation system, the method comprising:

• receiving a selection of a set of stimulation parameters defining characteristics of the stimulation signal to be generated;
• determining values of a first control signal and a second control signal based on the set of stimulation parameters;
• outputting the first control signal to control an amplitude of the stimulation signal;
• determining a state of a finite state machine;
• and
• outputting a second control signal based on the state of the state machine, the second control signal being adapted for controlling timing for the stimulation signal.

An electrical stimulation system for generating a stimulation signal for at least two electrodes coupled to a body part in a functional electrical stimulation system, the electrical stimulation system comprising:

• a controller unit operable for receiving at least one set of stimulation parameters, receiving a trigger signal;
• and in response to receiving the trigger signal, outputting at least a first control signal and a second control signal based on the at least one set of stimulation parameters;
• a voltage conversion module coupled to the controller unit, the voltage conversion module configured to receive at least the first control signal and converting a supply voltage based on the received first control signal to a positive converted voltage and a negative converted voltage;
• a first switch configured to receive the positive converted voltage and selectively outputting based on the second control signal the positive converted voltage at a stimulation output terminal;
• and
• a second switch configured to receive the negative converted voltage and selectively outputting based on the second control signal the negative converted voltage at the stimulation output terminal.

A computer readable medium comprising a plurality of instructions executable on a processor of a device for adapting the processor to implement a method of generating a stimulation signal for a functional electrical stimulation system, the computer readable medium comprising instructions for:

• receiving a selection of a set of stimulation parameters defining characteristics of the stimulation signal to be generated;
• determining values of a first control signal and a second control signal based on the set of stimulation parameters;
• outputting the first control signal to control an amplitude of the stimulation signal;
• determining a state of a finite state machine;
• and
• outputting a second control signal based on the state of the state machine, the second control signal being adapted for controlling timing for the stimulation signal.