This sawtooth-oscillator circuit,drawing less than 3.2 µA andworking at under 1V, is a useful buildingblock that fits the bill for extremelylow-power consumption and operationto low supply voltages.

Circuit designs abound for linear triangle/sawtooth generators, and many are based on the iconic LMC555 CMOS analog timer. But relatively few are voltage controlled, making them tricky to program with ...