Voltage drop across capacitor

[Manchested]

Hi, in the diagram below, does the voltage drop across the capacitor equal to the power supply voltage minus the diodes plus Vbe? is it possible to connect the capacitor in a way to the source so that the voltage across the capacitor equal to the power supply voltage?

https://www.electro-tech-online.com...-constant-current-load-aprox-1ma-temp_720.gif

 

[chuckey]

the voltage at the emitter is Vs -Vd + Vbe, so the collector voltage is that -Vsat of transistor (.2V?). What are you building?, looks like a sawtooth generator or such like. It is much better to use a miller integrator either with a transistor or an op-amp, this way you get a much larger and more linear saw tooth.
Frank