Broadcast reception circuit, broadcast reception apparatus, and broadcast reception method

A broadcast reception apparatus comprising:

• a selection unit configured to receive an RF signal, and to select a desired broadcast signal from the received RF signal in accordance with a predetermined control signal being input;
• an amplifier unit configured to amplify the selected broadcast signal;
• a booster unit configured to receive a power supply potential, and to increase the input power supply potential to output an increased potential;
• a control unit responsive to the increased potential output from the booster unit, said control unit being configured to generate the control signal for designating the desired broadcast signal, so as to supply the control signal to the selection unit;
• a semiconductor Zener device which has a Zener voltage value larger than a maximum value of a potential of the control signal, and is configured to suppress or limit the increased potential supplied from the booster unit to be not more than the Zener voltage value;
• and
• a demodulation unit configured to demodulate an amplified output from the amplifier unit so as to output a demodulated signal.

A broadcast reception system comprising:

• receiving an RF signal, and selecting a desired broadcast signal from the received RF signal in accordance with a predetermined control signal being input;
• amplifying the selected broadcast signal;
• increasing an input power supply potential to output an increased potential;
• responsive to the increased potential, generating the control signal, used to designate the desired broadcast signal, so as to supply the control signal;
• and
• suppressing or limiting the increased potential to be not more than a given Zener voltage value which is larger than a maximum value of a potential of the control signal.