.. Even if U 2A has a gain of 5 to convert F B ’s 600 mV to 3 V, this becomes only 125 µV. Bias current is 10-pA maximum at 25 C, but we are given a typical value only at 125 C of 250 pA. Of the two op-amps, U 2B sees the ...
.. characteristic. The combination of high gate resistance of the GaAs FET, the low-leakage Schottky diode, D 2 , and the 10-µF capacitor, C 1 , provides a high V GG RC time constant when the 5 V supply is off (in other words, at 0 V). ...
.. voltage, IC 1 includes an undervoltage-lockout feature that allows operation only when the line voltage is greater than 10 V. To protect against overvoltage, the circuit includes a three-transistor, no-bias-current, 50-nsec-operation ...
.. At the other extreme, under otherwise identical conditions, a V GS of 3.5 V will guarantee a drain current of less than 10 µA. For such, U 1 and the circuit as a whole will operate properly at a V S of 5 VDC. Higher temperatures might ...
.. 2 is used: (2) Equating the previous equations gives Equation 3: (3) So (4) From this, (5) Using preferred values, let R3 = 10 kΩ and R2 = 180 kΩ. This gives an upper limit of 29 V and a lower limit of 5.09 V. This is perfect for a ...
The isolated AC-to-DC flyback converter is the most commonly used power supply type for home and industrial devices. Fear of the main voltage and complexity of calculations cause electronic beginners and enthusiasts to procrastinate DIY such ...
.. the oscillator signal? To deal with this problem, I used a battery supply, four alkaline batteries in series, connected to a 10-turn, 100-kΩ potentiometer to drive the input of the circuit with about 0 to 6 V. This worked quite well. I added a ...
Without a doubt, FM transmitter and receiver are among the top favorite electronic project topics, however, building a digital FM transmitter can be a challenging project for electronics enthusiasts. The transmitter can then be connected to a ...
Recently, we’ve seen Design Ideas for programmable current sources with improved accuracy using the LM3x7 series of three-legged regulators. These designs also take advantage of those classic devices’ built-in anti-overheating features. ...
The project presented here is a professional quality phantom powered microphone pre-amplifier (Figure 1). The project is built using the INA163 chip from TI. The Chip is a very low-noise, low-distortion, monolithic instrumentation amplifier. R2 and ...