Name
Title | ||
|---|---|---|
22.6 A fully integrated counter-flow energy reservoir for 70%-efficient peak-power delivery in ultra-low-power systems. |
Abstract | ||
|---|---|---|
Recent advances in circuits have enabled significant reduction in the size of wireless systems such as implantable biomedical devices. As a consequence, the battery integrated in these systems has also shrunk, resulting in high internal resistances (∼10kΩ). However, the peak-current requirement of power-hungry components such as radios remains in the mW range, and hence cannot be directly supplied from the battery. Therefore, duty-cycled architectures such as pulsed-based radios have been proposed that transmit a short burst (∼1µs) of high power (∼10mW) supplied by an internal energy storage capacitor [1–3]. The capacitor is then recharged using a current limiter to protect the battery from excessive droop. This paradigm raises two challenges: 1) to supply sufficient energy, very large capacitance (u003e50nF) is often needed (200mV droop, for 10mW and 5µs), leading to large die area or bulky off-chip discrete components; 2) only a small fraction (∼5%) of energy stored in the capacitor is actually delivered to the high power components since the capacitor can only be discharged by a few 100s of mV while maintaining proper circuit operation (Fig. 22.6.1). |
Year | Venue | Field |
|---|---|---|
2017 | ISSCC | Capacitance,Capacitor,Computer science,Electric power system,Electronic engineering,Decoupling capacitor,Current limiting,Battery (electricity),Electronic component,Electrical engineering,Voltage droop |
DocType | Citations | PageRank |
Conference | 1 | 0.39 |
References | Authors | |
2 | 6 | |
Name | Order | Citations | PageRank |
|---|---|---|---|
| Xiao Wu | 1 | 11 | 3.75 |
| Kyo-jin Choo | 2 | 41 | 8.52 |
| Yao Shi | 3 | 23 | 4.92 |
| Li-Xuan Chuo | 4 | 10 | 2.42 |
| Dennis Sylvester | 5 | 5295 | 535.53 |
| David Blaauw | 6 | 8916 | 823.47 |