MC1350D-MOTO

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1. Description

MC1350 is an integrated circuit with a wide range of AGC, which can be used as an IF amplifier in radios and TVs in the operating temperature range of 0° to +75°C. The  input  amplifiers  (Q1  and  Q2)  operate  at  constantemitter  currents  so  that  input  impedance  remainsindependent  of  AGC  action.  Input  signals  may  be appliedsingle–ended  or  differentially  (for  ac)  with  identical  results.Terminals 4 and 6 may be driven from a transformer, but a dcpath from either terminal to ground is not permitted AGC action occurs as a result of an increasing voltage onthe base of Q4 and Q5 causing these transistors to conductmore   heavily   thereby   shunting   signal   current from  theinterstage  amplifiers  Q3  and  Q6.  The  output  amplifiers  aresupplied from an active current source to maintain constantquiescent  bias  thereby  holding  output admittance  nearlyconstant.  Collector  voltage  for  the  output  amplifier  must  besupplied through a center–tapped tuning coil to Pins 1 and 8.The 12 V supply (V+) at Pin 2 may be used for this purpose,but  output  admittance  remains  more  nearly  constant  if  aseparate  15  V  supply  (V++)  is  used,  because  the  basevoltage on the output amplifier varies with AGC bias.

2. Feature

    1. Power Gain: 50 dB Typ at 45 MHZ

                            50 dB Typ at 58 MHZ

    2. AGC Range: 60 dB Min, DC to 45 MHz

    3. Nearly Constant Input & Output Admittance over the Entire AGC Range

    4. Y21 Constant ( –3.0 dB) to 90 MHz

    5. Low Reverse Transfer Admittance: < < 1.0 μmho Typ

    6. 12 V Operation, Single–Polarity Power Supply

3. ELECTRICAL CHARACTERISTICS

4. Packaging Information