Ultra Low Voltage Nanopower Lc (colpitts) Oscillator Circuit

 This is an ultra-low supply voltage LC (Colpitts) Oscillator circuit using EPAD MOSFETs with passive resistor
load and output Buffer This circuit is similar to a classic LC Oscillator circuit used to power 5V circuits.
However, at low operating voltages, the values of the resistors and the impedance of the inverter MOSFET are
selected to optimize oscillation stability and at the same time minimize power consumption. Using the
appropriate component values, a LC circuit CAN be configured to operate in the range of supply voltages of V+
= 5V to 0.2V, with oscillating frequency ranges of 1 MHz to 4 MHz. The active-load reduces the minimum
operating voltage to 0.17V, and produces a figure of merit of 1MHz operation at 800nW of power
consumption. At higher frequencies in excess of 1 MHz, at frequencies of up to 10 MHz, a dual EPAD MOSFET
can be connected in parallel to provide more low voltage drive current necessary.
Recommended Components
EPAD MOSFET: M1, M2 ALD110900 (either single or dual MOSFET connected in parallel)
CL1=10pF; CL2 = 39pF;  RF= 5.6MOhm;  RL= 6 Ohm;  RD= 20KOhm; ROUT = 2.4KOhm; L1 = 1mH;
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Ultra Low Voltage Nanopower Lc (colpitts) Oscillator Circuit application circuits
Ultra Low Voltage Nanopower Lc (colpitts) Oscillator Circuit application circuits



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