1.5.5
FM/FSK Demodulator
A quadrature detector is employed together with an external discriminator and phase shift network to
demodulate the FM or FSK signal.
1.5.6
Zero-Power Mode
The device is powered down by applying a logic '0' level at the ENABLE input (pin 28). In this mode the
device current is reduced to less than 10
µ
A. This feature is useful when the device is operating within a
transceiver where the receiver needs to be enabled and disabled.
A delay should be allowed for the receiver to settle after power-up. This is likely to be less than the xtal
oscillator stabilisation time, which may be altered by adjusting the value of R2, shown in Figure 2.
©
1999
Consumer Microcircuits Limited
8
D/018/3
CMLMICRO [ CML MICROCIRCUITS ]
