Ultra Low Power Voltage Doubler

The voltage doubler as its name suggests a voltage doubler is a voltage multiplier circuit which has a voltage multiplication factor of two.

Ultra low power voltage doubler. This paper presents an ultra low power fully integrated dc dc converter for teg energy harvester application based on a novel switched capacitor voltage multiplier structure. Their high voltage conversion efficiency over 98 and low operating current 110µa for max1682 make these devices ideal for both battery powered and board level voltage doubler applications. Yet the output efficiency is 75 to 85 percent along its operating voltage range. Output 1 out1 can deliver a maximum of 40 ma from a 1 v input with output 2 out2 not loaded.

Here we present a low power voltage doubler circuit that can be readily used with devices that demand higher voltage than that of a standard battery but low operating current to work with. This paper presents a new four quadrant analog multiplier based on a dynamic threshold mos dtmos. The circuit is quite simple as it uses only a few components. Out2 can deliver a maximum of 20 ma from a 1 v input with out1 not loaded.

An ultra low power fully integrated energy harvester based on self oscillating switched capacitor voltage doubler. The two voltage doublers are cascaded to form an energy efficient dc dc converter which can operate with a very limited power source of a few nano watts. Here we present a low power voltage doubler circuit that can be readily used with devices that demand higher voltage than that of a standard battery but low operating current to work with. The attractive features of this dtmos transistor based multiplier are its supply voltages and total power consumption which were determined as 0 2 v and 18 4 nw respectively.

The circuit is quite simple as it uses only a few components. Low power voltage doubler circuit here ic1 is wired as an astable multivibrator to generate rectangular pulses at around 10 khz. The ultra small max1682 max1683 monolithic cmos charge pump voltage doublers accept input voltages ranging from 2 0v to 5 5v. The circuit consists of only two diodes two capacitors and an oscillating ac input voltage a pwm waveform could also be used.

This frequency and duty cycle of the pulses can be varied using preset vr1. The second circuit is a voltage doubler configuration as shown in fig. Newly proposed self oscillating switched capacitor sc dc dc voltage doublers are cascaded to form a complete harvester with configurable. This paper presents a fully integrated energy harvester that maintains 35 end to end efficiency when harvesting from a 0 84 mm 2 solar cell in low light condition of 260 lux converting 7 nw input power from 250 mv to 4 v.

The pulses are applied to switching transistors t1 and t2 for driving the output section which is configured as a voltage doubling circuit. Yet the output efficiency is 75 to 85 percent along its operating voltage range.