A square wave oscillator
A) is a type of relaxation oscillator
B) has two feedback circuits
C) is based on the principle of charging and discharging a capacitor
D) all of the above
Question 2
A relaxation oscillator whose frequency can be changed by a variable dc control voltage is called a
A) variable frequency oscillator
B) voltage-controlled oscillator
C) tunable oscillator
D) all of the above are components of the described oscillator