46. The primary function of the oscillator in an isolation amplifier is to
(a) convert dc to high-frequency ac
(b) convert dc to low-frequency ac
(c) rectify high-frequency ac to dc
(d) produce dual-polarity dc voltages for the input to the demodulator
47. The voltage gain of an OTA can be calculated using the formula
(a)
(b)
(c)
(d)
48. The gain of an OTA is the ratio of the output current to the input voltage, and is measured in _____________.
(a) amps
(b) volts
(c) siemens
(d) no units
49. The ________ amplifier is ideal for amplitude modulation since its gain is current-controlled.
(a) log
(b) operational transconductance
(c) isolation
(d) Schmitt
50. The external resistor of a typical instrumentation amplifier is used to set the ________.
(a) impedance
(b) rejection ratio
(c) gain
(d) isolation
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