.. circuit in Figure 1 adds a soft muting switch with power-up/power-down muting to a line-level audio circuit. R 4 , C 1 , and JFET Q 1 quietly ground a signal in 100 to ...
.. /constant voltage linear charger for single cell Li-ion and Li Polymer batteries. The device contains an on-chip power MOSFET and eliminates the need for the external sense resistor and blocking diode. An on-chip adaptive cell can ...
.. components: the PWM switch Q1, and the ripple filter capacitors C1 and C2. Note that V OUT will go to for about 6 ms during power up while C1 and C2 are charging, but that should be okay. The C2 capacitance required for 1 lsb (0.4%) PWM ...
.. are often packaged with a photodiode. The output current from this photodiode can be monitored to regulate the output power intensity of the laser diode. SLDs, however, are prone to pathological drifts, such as temperature variations ...
.. constant sink current of: It also illustrates adding a booster transistor Q1 to accommodate applications needing current or power beyond Z1’s modest TO92ish limits. Notice that Z1’s accuracy will be unimpaired because whatever ...
.. (µPs) that can produce a PWM clocked at 20 MHz. However, the supply currents running through that IC’s power supply bonding wires can cause voltage drops. This means that the PWM signals don’t quite swing to the ...
.. you have a load with a variable or poorly specified resistance and want to regulate the power applied to it (a heater for example), merely controlling the voltage or current will not work, as in both cases ...
.. to bulkier ON/OFF switches for DC circuits. The circuit has a fairly simple explanation. U1 is a counter. During power on, R2/C2 resets the counter to zero. When you push PB momentarily once, a pulse is generated and shaped by a ...
.. current source of: It also illustrates how adding a booster transistor Q1 can accommodate applications needing current or power beyond Z1’s modest limits. Notice that Z1’s accuracy will be unimpaired because, with whatever ...