Voltage regulation circuit for a radio with plural receivers

Device for receiving signals, in particular two radio signals containing a same information to be received, on two channels characterized by different carrier frequencies for each of the channels, comprising:

• a direct current electrical power supply which provides a supply voltage subject to decrease;
• a first receiver and a second receiver, said two receivers being responsive at a same time to different carrier frequencies, said two receivers being disposed in series between the two poles of said electrical power supply, said first receiver having a first operating voltage and said second receiver having a second operating voltage that is relatively lower than said first operating voltage, one terminal of one of said receivers being connected to one pole of said power supply, one terminal of the other receiver being connected to the other pole of said power supply and the other terminals of said receivers being connected together as common terminals;
• and
• voltage regulator means for regulating voltages between said terminals of said receivers to the respective operating voltages of said receivers when a voltage between said terminals of said electrical power supply is above said first operating voltage of said first receiver, and for regulating the voltage between said terminals of said second receiver to said second operating voltage when the voltage between said terminals of said electrical power supply decreases below said first operating voltage,
• whereby, when respective signals to be received by said receivers contain the same information to be received, the information is correctly receivable independently by both receivers when the voltage of said electrical power supply is above said first operating voltage and the information is correctly receivable by said second receiver having said second relatively lower operating voltage even though said first receiver having said first relatively higher operating voltage loses reception capability due to decrease in voltage between the terminals thereof to below said first operating voltage.