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4.2.1 Input voltage ： The multiple of the power amplifier is double and the
maximum output amplitude is 22Vpp. So the maximum input amplitude should be
limited within 11Vpp. The output signal will be distorted beyond the limitation.
4.2.2 Frequency range： The frequency range of the power amplifier is 10Hz～
150kHz. Within the range, the amplitude flatness is better than 3％ ; distortion is less
than 1％ ; The highest frequency can reach 200kHz.
4.2.3 Output power： The expression of power for the power amplifier is
P = V
2
/ R
Where, P is the output power(the unit is W), V is the output virtual amplitude
value (the unit is Vrms), R is the load resistance（the unit isΩ）.
The maximum output amplitude can reach 22Vpp（7.8Vrms） and the minimum load
resistance can be 2Ω. Besides, the higher the temperature of the working
environment, the larger is the frequency of the output signal. The less the distortion
of the output signal, the smaller the maximum output power. Usually, the maximum
output power can reach 7W(8Ω) or 1W(50Ω).
4.2.4Output protection： The power amplifier is of short circuit protection function
and over heat protection. Usually it is unable to be destroyed but long time output
short circuit should be avoided. The frequency, amplitude and loading should be best
within the limitation, two of which, especially, cannot get the limitation at the same
time in case that the power amplifier is damaged.
Chapter 5 Specifications
Characteristics of output A
Characteristics of output B
Output characteristics of TTL
General characteristic
Characteristics of optional component
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