an RC oscillator connected to {HEAD ~ the clock signal input} of the PWM generator and {TAIL ~ current compensation IC} and having a capacitor connected to the microprocessor; and 
an RC oscillator connected to { HEAD ~ the clock signal input } of the PWM generator and { TAIL ~ current compensation IC } and having a capacitor connected to the microprocessor ; and
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH