 The Endevco Model 2947B-2 is a stable, precision, 1000
pF shielded capacitor designed specifically for calibrating
charge sensing amplifiers. The voltage output from a signal
generator is readily converted to a charge signal by connecting
a capacitor in series between the generator and charge
amplifier.
The transfer function is: Q = EC
Where:
Q = Charge, in picocoulombs (pC)
E = Voltage, in volts (V)
C = Capacitance, in picofarads (pF)
Since the capacitor is exactly 1000 pF, the transfer function
simplifies to Q (pC) = E (mV). The charge must be expressed
in units of pC pk if the voltage is expressed in peak
units. Similarly, voltage rms converts to pC rms.
Features:
• Allows simulation of a piezoelectric transducer charge
output
• Precision 1000 pF shielded capacitor
• Used for charge amplifier calibration
• Converts voltage to charge
• Easy to use
Endevco Model 2947B-2
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