RSSI CONTROLLED I.F. LIMITER WITH IMPROVED INTERMODULATION PERFORMANCE
Original Publication Date: 1989-Aug-01
Included in the Prior Art Database: 2001-Nov-08
Large signals present in the receiver first i.f. stage may require limiting to avoid overdriving the i.f. amplifiers. In portable receivers this is usually done by placing a diode, typically a PIN or Schottky diode, in shunt with the crystal filters The diode conducts when the incoming i.f. signal is large enough to forward bias it, thereby limiting the signal (Figure 1).