An Active Capacitance Multiplier Based on Switched-Capacitor DC-DC Converter

2012 ◽  
Vol 263-266 ◽  
pp. 76-79
Author(s):  
Hui Kai Fu
Keyword(s):  
Integrated Circuits ◽  
Charge Pump ◽  
Switched Capacitor ◽  
Fully Integrated ◽  
Monolithic Integrated Circuits ◽  
Simulation Results ◽  
Output Characteristics ◽  
On Chip ◽  
Floating Capacitor ◽  
Capacitance Multiplier

A technique of replacing the floating capacitor by an active capacitance multiplier is proposed in this paper, in order to overcome the difficulty in fabrication of the large capacitors in monolithic integrated circuits. The simulation results show that the same output characteristics can be obtained from the new charge pump with a capacitor much smaller than that adopted in the normal charge pump products. Therefore, the new charge pump is much easier to be fabricated in fully integrated realizations with on-chip capacitor.

Integrated on-chip antennas for communication on and between monolithic integrated circuits

2009 ◽  
Vol 1 (4) ◽  
pp. 309-314 ◽  
Author(s):  
Hristomir Yordanov ◽  
Peter Russer
Keyword(s):  
Integrated Circuits ◽  
Transmission Line ◽  
Cross Talk ◽  
Electronic Circuit ◽  
Signal Transmission ◽  
Chip Area ◽  
Integrated Antennas ◽  
Monolithic Integrated Circuits ◽  
The Cross ◽  
On Chip

The rate of signal transmission on or between monolithic integrated circuits is limited by the cross-talk and the dispersion due to the wired interconnects. The bandwidth limitations can be overcome by wireless chip-to-chip and on-chip interconnects via integrated antennas. In this work the utilization of the electronic circuit ground planes as radiating elements for the integrated antennas has been proposed. This allows for optimal usage of chip area, as the antennas share the same metallization structure as the circuits. By exciting the interconnects between the patch areas in transmission line modes as well as in antenna modes, the interference between signals from circuit to circuit and antenna excitation signals is minimized. This has been achieved by inserting a transformer in the antenna feeding network. Examples of possible antenna and feeding structures have been investigated numerically. Scaled prototypes of the integrated antennas have been manufactured and measured.

scholarly journals A Fully Integrated Clocked AC-DC Charge Pump for Mignetostrictive Vibration Energy Harvesting

Electronics ◽  
2020 ◽  
Vol 9 (12) ◽  
pp. 2194
Author(s):  
Hayato Kawauchi ◽  
Toru Tanzawa
Keyword(s):  
Output Power ◽  
Charge Pump ◽  
Input Voltage ◽  
Open Circuit ◽  
Vibration Energy ◽  
Cmos Process ◽  
Vibration Energy Harvesting ◽  
Fully Integrated ◽  
Energy Transducer ◽  
On Chip

This paper describes a clocked AC-DC charge pump to enable full integration of power converters into a sensor or radio frequency (RF) chip even with low open circuit voltage magnetostrictive vibration energy transducer operating at a low resonant frequency of 10 Hz to 1 kHz. The frequency of the clock to drive an AC-DC charge pump was up-converted with an on-chip oscillator to increase output power of the charge pump without significantly increasing the circuit area. A model of the system including the charge pump and vibration energy transducer is shown. It was validated by HSPICE simulation and measured, resulting in a prototype chip with an area of 0.11 mm2 fabricated in a 65 nm 1 V CMOS process. The fabricated charge pump was also measured together with a magnetostrictive transducer. The charge pump converted the power from the transducer to an output power of 4.2 μW at an output voltage of 2.0 V. The output power varied below 3% over a wide input frequency of 10 Hz to 100 kHz, which suggests that universal design of the clocked AC-DC charge pump can be used for transducers with different resonant frequencies. In a low-input voltage region below 0.8 V, the proposed circuit has higher output power compared with the conventional circuits.

Sign in / Sign up

Export Citation Format

Share Document