Advances in Microelectronics for Implantable Medical Devices

Figure 16

Stimulator circuits [72]: (a) configuration with large off-chip blocking capacitor; (b) HFCS charge transfer block; (c) isolated discharge switch (𝑀₅--𝑀₇ are depletion transistors); (d) isolated cathode switch. The combination of (b), (c), and (d) provides a safe stimulator circuit with no off-chip blocking capacitors.