I have the below circuit where the input voltage is 8V and a PWM pulse is given to the base of the Q101 transistor.
From what I have measured,
The voltage at the anode of the diodes D102 and D103 is constant like around 8V. But when I measure the voltage at the cathode of the D103 and D103, I get a PWM waveform whose peak value is 7.7V.
Voltage measurements are done using oscilloscope.
My questions :
How to measure the voltage drop across the diodes D102 and D103 in this senario?
Why am I getting a PWM voltage waveform only the cathode of the diode and not at the anode?
Why is there a 0.3V voltage drop across the diode? Shouldn't it be typ. 0.7V?
BOUNTY EDIT :
-The 8V is the voltage source. SBATT is connected to a load which draws a minimum current of 80mA and a maximum of 100mA.
-The temperature of the circuit , which I have measured is not 150degC. The temperature is around 85degC
-The diode is not a schottky diode.