RADIO FREQUENCY SWITCHING CIRCUIT WITH ADVANCED ISOLATION CHARACTERISTICS
First Claim
1. A radio frequency switching circuit comprising:
- a first switching circuit unit including first to nth (n is a natural number greater than at least
2) transistors M1 to Mn connected in series between a first signal port for transmission and reception of signals and a common connection node connected to an antenna port and operated according to a first gate signal;
a second switching circuit unit connected in series between the common connection node and a second signal port for transmission and reception of signals and operated according to a second gate signal; and
a first impedance adjuster forming an alternating current (AC) ground path between a ground and a gate of the first transistor of the first switching circuit unit when the first switching circuit unit is in an off-state.
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Accused Products
Abstract
A radio frequency switching circuit may include a first switching circuit unit including first to nth (n is a natural number greater than at least 2) transistors M1 to Mn connected in series between a first signal port for transmission and reception of signals and a common connection node connected to an antenna port and operated according to a first gate signal; a second switching circuit unit connected in series between the common connection node and a second signal port for transmission and reception of signals and operated according to a second gate signal; and a first impedance adjuster forming an alternating current (AC) ground path between a ground and a gate of the first transistor of the first switching circuit unit when the first switching circuit unit is in an off-state.
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Citations
18 Claims
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1. A radio frequency switching circuit comprising:
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a first switching circuit unit including first to nth (n is a natural number greater than at least
2) transistors M1 to Mn connected in series between a first signal port for transmission and reception of signals and a common connection node connected to an antenna port and operated according to a first gate signal;a second switching circuit unit connected in series between the common connection node and a second signal port for transmission and reception of signals and operated according to a second gate signal; and a first impedance adjuster forming an alternating current (AC) ground path between a ground and a gate of the first transistor of the first switching circuit unit when the first switching circuit unit is in an off-state. - View Dependent Claims (2, 3, 4)
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5. A radio frequency switching circuit comprising:
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a reception switching circuit unit including first to nth (n is a natural number greater than at least
2) transistors connected in series between a first signal port for transmission and reception of signals and a common connection node connected to an antenna port and operated according to a first gate signal;a transmission switching circuit unit including first to mth (m is a natural number greater than at least
2) transistors connected in series between a second signal port for transmission and reception of signals and the common connection node and operated according to a second gate signal;a first impedance adjuster forming an alternating current (AC) ground path between a ground and a gate of the first transistor of the reception switching circuit unit when the reception switching circuit unit is in an off-state; and a second impedance adjuster forming an AC ground path between a ground and a gate of the first transistor of the transmission switching circuit unit when the transmission switching circuit unit is in an off-state. - View Dependent Claims (6, 7, 8, 9, 10, 11)
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12. A radio frequency switching circuit comprising:
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a reception switching circuit unit including first to nth (n is a natural number greater than at least
2) transistors connected in series between a first signal port for transmission and reception of signals and a common connection node connected to an antenna port and operated according to a first gate signal,a transmission switching circuit unit including first to mth (m is a natural number greater than at least
2) transistors connected in series between a second signal port for transmission and reception of signals and the common connection node and operated according to a second gate signal;a first impedance adjuster forming an alternating current (AC) ground path between a ground and a gate of each of at least two transistors including the first transistor among the first to nth transistors of the reception switching circuit unit when the reception switching circuit unit is in an off-state, and a second impedance adjuster forming an AC ground path between a ground and a gate of each of at least two transistors including the first transistor among the first to mth transistors of the transmission switching circuit unit when the transmission switching circuit unit is in an off-state. - View Dependent Claims (13, 14, 15, 16, 17, 18)
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Specification