Two programs
- Class B
- Class D
The piezoelectric actuator may be due to RLC equivalent circuit shown in Figure 1, it has the following characteristics:
- Low frequency high frequency capacitive, inductive IF
- C0 and Cg in the contribution of high and low frequency of different low frequency to C0-based, high-frequency mainly to Cg
- Inductive near capacitive switching discontinuous fp
Prone to mutations reactance amplifier unstable, and the same high-frequency amplifier amplifies a multiple of the price, and therefore selects the bandwidth of the amplifier needs to fs or less.
FIG piezoelectric actuator and electrical equivalent circuit of an anti - frequency relationship
Note that when the power amplifier design
- Op amp phase compensation
- Use the op amp driving capacitive loads
- The piezoelectric ceramic transducer impedance matching design
Reprinted ---- ---- consent obtained Wayne Khou