Abstract: The present invention includes a power amplifying stage having a power amplifying element having a main electrode and a control electrode, and a bias control circuit that is supplied with a bias switching voltage and an operating point adjusting voltage for adjusting the bias voltage value to the control electrode of the power amplifying element by the bias switching voltage and the operating point adjusting voltage and hence adjusting the operating point of the power amplifying element, wherein the bias control circuit adjusts the operating point of the power amplifying element by switching between supply and stop of the bias voltage to the control electrode of the power amplifying element by the bias switching voltage, and varying the bias voltage value to be supplied to the control electrode of the power amplifying element by the operating point adjusting voltage in phase.

Abstract: The present invention includes a power amplifying stage having a power amplifying element having a main electrode and a control electrode, and a bias control circuit that is supplied with a bias switching voltage and an operating point adjusting voltage for adjusting the bias voltage value to the control electrode of the power amplifying element by the bias switching voltage and the operating point adjusting voltage and hence adjusting the operating point of the power amplifying element, wherein the bias control circuit adjusts the operating point of the power amplifying element by switching between supply and stop of the bias voltage to the control electrode of the power amplifying element by the bias switching voltage, and varying the bias voltage value to be supplied to the control electrode of the power amplifying element by the operating point adjusting voltage in phase.

Abstract: A wireless LAN (local area network) card includes a circuit board having a plurality of connector terminals; a transmission and reception circuit formed on a surface of the circuit board; a baseband circuit formed on the surface; a non-volatile memory mounted on the surface; and a box-shaped cover for covering the transmission and reception circuit. The non-volatile memory is disposed in the vicinity of the transmission and reception circuit so that the transmission and reception circuit and the non-volatile memory are covered by the cover. The wireless LAN card requires no coating resin, and is therefore efficient in usability and cost.

Abstract: The present invention provides an electronic apparatus to be detachably loaded with an IC card. The apparatus comprises a loading operation detecting unit for detecting a loading operation of the IC card; an unloading operation detecting unit for detecting a unloading operation of the IC card; and an IC card controlling portion for controlling an input/output of the IC card based on a result detected by one of the loading operation detecting unit and the unloading operation detecting unit. The loading operation detecting unit and the unloading operation detecting unit each includes an elastic conductor member for detecting a contacting thereof with a frame ground terminal plate disposed on an outer portion of the IC card.