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    • 3. 发明公开
    • RADIO FREQUENCY SWITCH
    • 高频开关
    • EP1072094A1
    • 2001-01-31
    • EP99917010.3
    • 1999-04-14
    • ROKE MANOR RESEARCH LIMITED
    • STEVENS, Roderick, Leonard, Wallace
    • H03K17/56
    • H03K17/56
    • A radio frequency switch (20) as shown in Figure 2, which operates to communicate a radio frequency signal from an input (26) of the switch to the output (28) of the switch in accordance with a control signal applied to a control input (24) of the switch comprises a semiconductor diode (30) coupled between the input of the switch (26) and the output of the switch (28) via capacitors (32, 34) and a digital logic flip-flop (22) having a first output (Q) generating a first voltage (+V) and a second output (Q) generating an inverse of the first voltage (-V) and an activating input (D) coupled to the control input (24) of the radio frequency switch. The first output (Q) of the flip-flop is coupled to a cathode of the diode and the second output (Q) is coupled to the anode of the diode so that when the flip-flop (22) is in a first state, the diode is reversed biased and consequent upon a change in said control signal, said first output (Q) generates the inverse of the first voltage (-V) and said second output (Q) generates the first voltage (+V) thereby forward biasing said semiconductor diode and connecting the input of the switch to the output of the switch.
    • 4. 发明授权
    • RADIO FREQUENCY SWITCH
    • 高频开关
    • EP1072094B1
    • 2003-01-15
    • EP99917010.3
    • 1999-04-14
    • ROKE MANOR RESEARCH LIMITED
    • STEVENS, Roderick, Leonard, Wallace
    • H03K17/56
    • H03K17/56
    • A radio frequency switch (20) as shown in Figure 2, which operates to communicate a radio frequency signal from an input (26) of the switch to the output (28) of the switch in accordance with a control signal applied to a control input (24) of the switch comprises a semiconductor diode (30) coupled between the input of the switch (26) and the output of the switch (28) via capacitors (32, 34) and a digital logic flip-flop (22) having a first output (Q) generating a first voltage (+V) and a second output ( Q ) generating an inverse of the first voltage (-V) and an activating input (D) coupled to the control input (24) of the radio frequency switch. The first output (Q) of the flip-flop is coupled to a cathode of the diode and the second output ( Q ) is coupled to the anode of the diode so that when the flip-flop (22) is in a first state, the diode is reversed biased and consequent upon a change in said control signal, said first output (Q) generates the inverse of the first voltage (-V) and said second output ( Q ) generates the first voltage (+V) thereby forward biasing said semiconductor diode and connecting the input of the switch to the output of the switch.