Abstract: When a power source of a digital broadcasting receiving apparatus is turned on, a microprocessor executes reading of a Read Data with specifying a Read Slave Address which is set by applying a prescribed electrical potential to an Address Select (AS) terminal, if the microprocessor confirms that an A/D converter (ADC) bit which is contained in the Read Data from a Mixer Oscillator PLL (MOP) IC is a ADC bit which is set by applying a prescribed electrical potential to an ADC terminal, the microprocessor transmits a tuning data of a format which corresponds to the MOP IC in which target channel is specified with specifying a Write Slave Address which is set by applying a prescribed electrical potential to the AS terminal.

Abstract: When a power source of a digital broadcasting receiving apparatus is turned on, a microprocessor executes reading of a Read Data with specifying a Read Slave Address which is set by applying a prescribed electrical potential to an Address Select (AS) terminal, if the microprocessor confirms that an A/D converter (ADC) bit which is contained in the Read Data from a Mixer Oscillator PLL (MOP) IC is a ADC bit which is set by applying a prescribed electrical potential to an ADC terminal, the microprocessor transmits a tuning data of a format which corresponds to the MOP IC in which target channel is specified with specifying a Write Slave Address which is set by applying a prescribed electrical potential to the AS terminal.

Abstract: A circuit board connector includes a main body portion, a first connecting portion for connection to a first circuit board, and a second connecting portion for connection to a second circuit board. The circuit board connector is obtained by cutting a conductive plate material provided with plating layers on front and back sides thereof, and thereafter forming the second connecting portion into a shape having an annular transverse cross section in such a manner that one of the plating layers forms an outer circumferential surface of the second connecting portion.

Abstract: The present invention provides a shield case comprising a frame body having an interior divided by partition plates and housing electronic components therein and a closure for providing electric shield by covering an opening portion of the frame body, and having a slit piece integrally formed with the closure by cutting out a part of the closure along a periphery except for a base portion to a raised form, the slit piece for coming into contact with an end of the partition plate, the slit piece being formed in a gutter shape from the base portion to the other end. Furthermore, the slit piece has the gutter shape which becomes greater in curvature radius from the base portion to the other end. This enables the shield case of the high-frequency device of the present invention to strengthen the contact between the slit piece formed with the closure for providing grounding and the partition plates provided within the frame body, whereby the reliable high-frequency device can be provided.

Abstract: A circuit board connector includes a main body portion, a first connecting portion for connection to a first circuit board, and a second connecting portion for connection to a second circuit board. The circuit board connector is obtained by cutting a conductive plate material provided with plating layers on front and back sides thereof, and thereafter forming the second connecting portion into a shape having an annular transverse cross section in such a manner that one of the plating layers forms an outer circumferential surface of the second connecting portion.

Abstract: The present invention provides a shield case comprising a frame body having an interior divided by partition plates and housing electronic components therein and a closure for providing electric shield by covering an opening portion of the frame body, and having a slit piece integrally formed with the closure by cutting out a part of the closure along a periphery except for a base portion to a raised form, the slit piece for coming into contact with an end of the partition plate, the slit piece being formed in a gutter shape from the base portion to the other end. Furthermore, the slit piece has the gutter shape which becomes greater in curvature radius from the base portion to the other end.