Abstract:
Disclosed herein is a circuit for controlling a switching time of a transmitting and receiving signal in a wireless communication system including: a high speed switch circuit unit receiving a signal transceived through an antenna to perform a high speed switching operation; a low speed switch circuit unit the signal transceived through the antenna to perform a low speed switching operation; and a controlling unit applying a control signal for controlling a switching time to the high speed switch circuit unit or the low speed switch circuit unit.
Abstract:
A front end circuit includes a bypass circuit comprising a first bypass switch and a second bypass switch configured to bypass a signal to a first terminal according to switching operations of the first bypass switch and the second bypass switch; and an amplifier connected in parallel to the bypass circuit and configured to amplify the signal.
Abstract:
A low noise amplifier circuit includes a first amplifier including a first transistor and a second transistor that are cascode-connected to each other; a second amplifier including a third transistor and a fourth transistor that are cascode-connected to each other; a source terminal matcher connected to a source of the first transistor and a source of the third transistor; and an input matcher providing input that is impedance-matched by a first inductor and a second inductor to a gate of the first transistor and providing input which is impedance-matched by the first inductor to a gate of the third transistor. The circuit is able to operate in a dual-band and provide impedance matching, while being simpler than alternative circuits.
Abstract:
There is provided a radio frequency switch circuit including a first switch circuit unit connected between a first node connected to a first signal port and a common node connected to a common port, and operated according to a first control signal, a second switch circuit unit connected between a second node connected to a second signal port and the common node and operated according to a second control signal having a phase opposite to that of the first control signal, a first shunt circuit unit connected between the second node and a common source node and operated according to the first control signal, a second shunt circuit unit connected between the first node and the common source node, and a source voltage generating unit generating a source voltage, wherein the source voltage is lower than a high level of the first control signal and higher than a ground potential.
Abstract:
A front end circuit includes a bypass circuit comprising a first bypass switch and a second bypass switch configured to bypass a signal to a first terminal according to switching operations of the first bypass switch and the second bypass switch; and an amplifier connected in parallel to the bypass circuit and configured to amplify the signal.
Abstract:
Disclosed herein is a circuit for controlling a switching time of a transmitting and receiving signal in a wireless communication system including: a high speed switch circuit unit receiving a signal transceived through an antenna to perform a high speed switching operation; a low speed switch circuit unit the signal transceived through the antenna to perform a low speed switching operation; and a controlling unit applying a control signal for controlling a switching time to the high speed switch circuit unit or the low speed switch circuit unit.