Abstract: Tissue treatment systems and methods are disclosed. In an embodiment, a tissue treatment system includes a LV signal generator, a HV signal generator, and a controller. The LV signal generator is used to produce a LV tissue impedance measurement signal, and the HV signal generator is used to produce a HV tissue treatment signal having a voltage that is at least five times greater than a voltage of the LV tissue impedance measurement signal. The controller controls when the HV tissue treatment signal produced using the HV signal generator, and when the LV tissue impedance measurement signal produced using the LV signal generator, are delivered to patient tissue via an active electrode and a return electrode. The LV tissue impedance measurement signal is used to estimate the impedance of the patient tissue, which is used to control the voltage and/or current of the HV tissue treatment signal.

Abstract: Embodiments described herein relate to signal generators, systems including signal generators, and related methods. A signal generator includes capacitor(s) to store energy used to generate a treatment signal. The signal generator also includes a waveform shaping circuit, a controller, a voltage sense circuit, and a current sense circuit. The waveform shaping circuit is coupled to the capacitor(s) and includes first, second, third, and fourth switches, each of which is configured to be selectively turned ON and OFF, to allow current to pass through the switch when turned ON, and to prevent current from passing through the switch when turned OFF. The controller selectively controls the switches in order to generate the treatment signal. The controller also selectively controls the switches in order to perform certain fault tests, which rely on voltages sensed by the voltage sense circuit and currents sensed by the current sense circuit.

Abstract: Embodiments described herein relate to signal generators, systems including signal generators, and related methods. A signal generator includes capacitor(s) to store energy used to generate a treatment signal. The signal generator also includes a waveform shaping circuit, a controller, a voltage sense circuit, and a current sense circuit. The waveform shaping circuit is coupled to the capacitor(s) and includes first, second, third, and fourth switches, each of which is configured to be selectively turned ON and OFF, to allow current to pass through the switch when turned ON, and to prevent current from passing through the switch when turned OFF. The controller selectively controls the switches in order to generate the treatment signal. The controller also selectively controls the switches in order to perform certain fault tests, which rely on voltages sensed by the voltage sense circuit and currents sensed by the current sense circuit.