Sound intermediate frequency amplifier for a broadcast receiver

Abstract

In a broadcast receiver, a dc voltage operating source is coupled to an operating voltage terminal of a sound IF integrated circuit via a collector/emitter path of a transistor, and a second source of operating voltage is connected via an RC integrating network to the base of the transistor, with the base of the transistor being connected to ground via a zener diode.

1. A sound intermediate frequency amplifier for a broadcast receiver comprising;
 an integrated circuit having an operating voltage terminal connected to a first source of a dc operating voltage, said operating voltage terminal being connected to ground via a capacitor,  
 said first source of operating voltage is connected to said operating voltage terminal via a collector-emitter path of a transistor, and  
 a second source of operating voltage is connected via a RC integrating network to a base of said transistor, the base being connected to ground via a zener diode.  
 
     
     
       2. The amplifier according to  claim 1 , wherein a resistor is provided between said transistor and said operating voltage terminal. 
     
     
       3. The amplifier according to  claim 1 , wherein said second source of operating voltage is higher than said first source of operating voltage.