.. ramp followed by a quick reset to zero) from digital timing signals is a common function. It usually requires a negative supply as sketched in Figure 1, where Negative current through R1 ramps up inverting integrator A1’s output ...
.. voltage of the capacitor can be made to oscillate around a midpoint above ground. This design was used to construct a power supply for a thermally driven MEMS. Appendix Figure 3 shows a circuit where a capacitor is charged from a potential ...
.. the red and green LEDs are 2 and 2.1 V, respectively. Op amp IC 1A derives a buffered 2.5 V reference output from the 5 V supply, and R 3 limits the current to the LED when it is on. IC 1B buffers and amplifies the probed logic signal to ...
.. grounded load negative current source with a novel LM337 topology. With this topology, accuracy is insensitive to supply rail tolerance. The asterisked resistors are 1% or better and R S = 1.25 Ω. The PWM frequency, F PWM , is ...
.. expensive, the biquad circuit of Figure 1 may be a cost-competitive solution. Many filter applications require higher supply voltages, bipolar operation, or both, so the single 5 V supply associated with most switched-capacitor ...
.. are present, it returns the circuit to standby mode by de-asserting the Hold line. The circuit draws less than 2 uA of supply current while in standby mode, and approximately 40 uA when active. The combined battery monitor and ...
.. colleague asked for the measured jitter number on a single-supply comparator design based on the LM359 IC ( Ref. 1 ). He wanted to know how the jitter performance of the ...
.. short propagation delays (TPD); accurate duty-cycle generation; push-pull, rail-to-rail output; and operation from a supply above 15 V. Figure 1. The schematic and text include several circuit options (current source, transistor ...