Patent ID: 7414821
Filing Date: 2008-08-19
Classification: H01L,H03F

Abstract:
1. A wireless communication mobile terminal apparatus, comprising: an antenna; a transmitting circuitry including a transmission modulator to which transmission base band signals and transmission intermediate frequency local signals are supplied and which outputs a transmission intermediate frequency output signal and a transmission frequency conversion circuit to which the transmission intermediate frequency output signal and a transmission radio frequency local signal are supplied; a receiving circuitry, processing a radio frequency input signal received by the antenna and outputting reception base band signals, including a reception demodulator which responds to the radio frequency input signal received by the antenna and a reception local signal and a low noise amplifier for receiving and amplifying the radio frequency input signal received by the antenna; and a radio frequency power amplifier which amplifies an output of the transmission frequency conversion circuit and outputs to the antenna, wherein the transmitting circuitry and the receiving circuitry are monolithically integrated on a silicon semiconductor chip, wherein a protective circuit is also monolithically integrated on the silicon semiconductor chip and arranged between the antenna and the low noise amplifier so that the protective circuit is prevented from suffering from electrostatic breakdown of the low noise amplifier, wherein the semiconductor chip includes a first voltage line which is supplied with a first voltage (VCC) and a second voltage line which is supplied with a second voltage (GND) lower than the first voltage, wherein the protective circuit which is arranged between the first voltage line and the second voltage line and which includes a signal node which receives the high frequency signal, a first protection unit (A) which allows an electric current flow from the first voltage line to the signal node and a second protection unit (B) which allows an electric current flow from the signal node to the second voltage line, a third protection unit (C) which allows an electric current flow from the signal node to the first voltage line and a fourth protection unit (D) which allows an electric current flow from the second voltage line to the signal node, wherein the first protection unit includes a first protection circuit and a plurality of first diodes which are connected in series and arranged between the first voltage line and the signal node, and wherein the second protection unit includes a second protection circuit and a plurality of second diodes which are connected in series and arranged between the signal node and the second voltage line.