US6700439B2
Expired / Lapsed
US
⏱️ 0.0 years remaining
Zero-bias bypass switch
Assignee: Commscope Technologies LLC
•
Filing: 2002-04-11
•
Granted: 2004-03-02
•
Expires: 2022-04-11
Abstract
Abstract A zero bypass apparatus for a low noise amplifier includes a bypass circuit, and a switching circuit coupled with a low noise amplifier and with the bypass circuit. The switching circuit includes one or more solid state devices responsive to absence of a control bias for switching an RF input signal from said amplifier to the bypass circuit with a low insertion loss and high isolation.
Inventors
- 👤 Donald G. Jackson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:06
CPC Classifications
H; H03; H03F; H03F1/00; H03F1/52; H03F3/00; H03F3/60; H03F2200/00; H03F2200/198; H03F2200/294; H03F2200/372; H03F2203/00; H03F2203/72; H03F2203/7239
Claims Analysis
Total Claims: 53
Claim 1
Independent Claim
97 words
A zero-bias bypass apparatus comprising: a bypass circuit; an amplifier; and a switching circuit coupled with the amplifier and with said bypass circuit, said switching circuit and bypass circuit comprising solid state devices; in the presence of a control bias, the bypass circuit being configured as open and the switching circuit being configured to direct an RF input signal to the amplifier for being amplified; the switching circuit being responsive to loss and subsequent absence of a control bias for switching an RF input signal from said amplifier to a closed bypass circuit to bypass the amplifier.
Claim 2
Dependent Claim
97 words
A zero-bias bypass apparatus comprising: a bypass circuit; an amplifier; and a switching circuit coupled with the amplifier and with said bypass circuit, said switching circuit and bypass circuit comprising solid state devices; in the presence of a control bias, the bypass circuit being configured as open and the switching circuit being configured to direct an RF input signal to the amplifier for being amplified; the switching circuit being responsive to loss and subsequent absence of a control bias for switching an RF input signal from said amplifier to a closed bypass circuit to bypass the amplifier.
Claim 3
Dependent Claim
28 words
The apparatus of claim 1 wherein insertion loss of the switching circuit is a maximum of about 0.5 dB and isolation is a minimum of about 25 dB.
Claim 4
Dependent Claim
21 words
The apparatus of claim 1 wherein said bypass circuit comprises two quarter wavelength lines coupled in series to bypass said amplifier.
Claim 5
Dependent Claim
51 words
The apparatus of claim 1 wherein said switching circuit comprises at least one diode in series with an input of said amplifier, said diode being biased into a conductive state in the presence of said control bias and being biased into a nonconductive state in the absence of said control bias.
Claim 6
Dependent Claim
51 words
The apparatus of claim 1 wherein said switching circuit comprises at least one diode in series with an output of said amplifier, said diode being biased into a conductive state in the presence of said control bias and being biased into a nonconductive state in the absence of said control bias.
Claim 7
Dependent Claim
41 words
The apparatus of claim 3 wherein said switching circuit comprises at least one diode coupled from a junction of said quarter wavelength lines to a radio frequency ground, and biased into a nonconductive state in the absence of said control bias.
Claim 8
Dependent Claim
52 words
The apparatus of claim 3 and further including a DC blocking circuit in series between said two quarter wavelength lines and at least one diode coupled from either side of said DC blocking circuit to a radio frequency ground, and biased into a nonconductive state in the absence of said control bias.
Claim 9
Dependent Claim
56 words
The apparatus of claim 1 wherein said switching circuit comprises at least one diode in series with each of an input and an output of said amplifier, said diodes being biased into a conductive state in the presence of said control bias and being biased into a nonconductive state in the absence of said control bias.
Claim 10
Dependent Claim
28 words
The apparatus of claim 4 further including a quarter wavelength line coupled between a control bias and an electrode of the diode at the input of said amplifier.
Claim 11
Dependent Claim
29 words
The apparatus of claim 5 further including a quarter wavelength line coupled between a control bias source and an electrode of the diode at the output of said amplifier.
Claim 12
Dependent Claim
26 words
The apparatus of claim 3 wherein said bypass circuit includes three quarter wavelength lines coupled in series between said input and said output of said amplifier.
Claim 13
Dependent Claim
38 words
The apparatus of claim 4 wherein the switching circuit further includes a resonant circuit coupled with said diode and selected to resonate with the diode so as to minimize the impedance of the diode in an off state.
Claim 14
Dependent Claim
38 words
The apparatus of claim 5 wherein the switching circuit further includes a resonant circuit coupled with said diode and selected to resonate with the diode so as to minimize the impedance of the diode in an off state.
Claim 15
Dependent Claim
38 words
The apparatus of claim 6 wherein the switching circuit further includes a resonant circuit coupled with said diode and selected to resonate with the diode so as to minimize the impedance of the diode in an on state.
Claim 16
Dependent Claim
49 words
The apparatus of claim 6 further comprising multiple diodes coupled from junctions of said quarter wavelength lines to radio frequency ground, and multiple resonant circuits coupled with the diodes and selected to resonate with said diodes so as to minimize the impedance of the diodes in an on state.
Claim 17
Dependent Claim
20 words
The apparatus of claim 1 wherein said insertion loss is about 0.15 dB and said isolation is about 60 dB.
Claim 18
Dependent Claim
96 words
A zero-bias bypass apparatus for bypassing an amplifier comprising: a bypass circuit having a path configured for coupling between an input and an output of an amplifier; and a switching circuit coupled with said bypass circuit and configured for coupling with the amplifier to direct an RF input signal to the amplifier in the presence of a control bias, said switching circuit and bypass circuit comprising solid state devices, the switching circuit being responsive to loss and subsequent absence of a control bias for switching an RF input signal from said amplifier to said bypass circuit.
Claim 19
Dependent Claim
96 words
A zero-bias bypass apparatus for bypassing an amplifier comprising: a bypass circuit having a path configured for coupling between an input and an output of an amplifier; and a switching circuit coupled with said bypass circuit and configured for coupling with the amplifier to direct an RF input signal to the amplifier in the presence of a control bias, said switching circuit and bypass circuit comprising solid state devices, the switching circuit being responsive to loss and subsequent absence of a control bias for switching an RF input signal from said amplifier to said bypass circuit.
Claim 20
Dependent Claim
30 words
The apparatus of claim 17 wherein said insertion loss of the switching circuit is a maximum of about 0.5 dB and said isolation is a minimum of about 25 dB.
Claim 21
Dependent Claim
21 words
The apparatus of claim 17 wherein said bypass circuit comprises two quarter wavelength lines coupled in series to bypass the amplifier.
Claim 22
Dependent Claim
49 words
The apparatus of claim 17 wherein said switching circuit comprises at least one diode configured for coupling with an input of said amplifier, said diode being biased into a conductive state by said control bias and being biased into a nonconductive state in the absence of said control bias.
Claim 23
Dependent Claim
49 words
The apparatus of claim 17 wherein said switching circuit comprises at least one diode configured for coupling with an output of said amplifier, said diode being biased into a conductive state by said control bias and being biased into a nonconductive state in the absence of said control bias.
Claim 24
Dependent Claim
41 words
The apparatus of claim 19 wherein said switching circuit comprises at least one diode coupled from a junction of said quarter wavelength lines to a radio frequency ground and biased into a nonconductive state in the absence of said control bias.
Claim 25
Dependent Claim
52 words
The apparatus of claim 19 and further including a DC blocking circuit in series between said two quarter wavelength lines and at least one diode coupled from either side of said DC blocking circuit to a radio frequency ground, and biased into a nonconductive state in the absence of said control bias.
Claim 26
Dependent Claim
58 words
The apparatus of claim 17 wherein said switching circuit comprises at least one diode configured to be in series with each of an input and output of said amplifier, said diodes being biased into a conductive state in the presence of said control bias and being biased into a nonconductive state in the absence of said control bias.
Claim 27
Dependent Claim
32 words
The apparatus of claim 20 and further including a quarter wavelength line coupled between a control bias and an electrode of the diode configured to be at the input of the amplifier.
Claim 28
Dependent Claim
32 words
The apparatus of claim 21 and further including a quarter wavelength line coupled between a control bias and an electrode of the diode configured to be at the output of the amplifier.
Claim 29
Dependent Claim
21 words
The apparatus of claim 19 and further including a third quarter wavelength line in series with said two quarter wavelength lines.
Claim 30
Dependent Claim
38 words
The apparatus of claim 20 wherein the switching circuit further includes a resonant circuit coupled with said diode and selected to resonate with the diode so as to minimize the impedance of the diode in an off state.
Claim 31
Dependent Claim
38 words
The apparatus of claim 21 wherein the switching circuit further includes a resonant circuit coupled with said diode and selected to resonate with the diode so as to minimize the impedance of the diode in an off state.
Claim 32
Dependent Claim
38 words
The apparatus of claim 22 wherein the switching circuit further includes a resonant circuit coupled with said diode and selected to resonate with the diode so as to minimize the impedance of the diode in an on state.
Claim 33
Dependent Claim
49 words
The apparatus of claim 22 further comprising multiple diodes coupled from junctions of said quarter wavelength lines to radio frequency ground, and multiple resonant circuits coupled with the diodes and selected to resonate with said diodes so as to minimize the impedance of the diodes in an on state.
Claim 34
Dependent Claim
20 words
The apparatus of claim 17 wherein said insertion loss is about 0.15 dB and said isolation is about 60 dB.
Claim 35
Independent Claim
62 words
A method for selectively bypassing an amplifier, comprising: coupling a bypass circuit to an amplifier; directing an RF input signal to the amplifier in the presence of a control bias and in response to the loss and subsequent absence of the control bias to at least one solid state device, switching the RF input signal from said amplifier to said bypass circuit.
Claim 36
Independent Claim
62 words
A method for selectively bypassing an amplifier, comprising: coupling a bypass circuit to an amplifier; directing an RF input signal to the amplifier in the presence of a control bias and in response to the loss and subsequent absence of the control bias to at least one solid state device, switching the RF input signal from said amplifier to said bypass circuit.
Claim 37
Dependent Claim
29 words
The method of claim 33 wherein said insertion loss of the switching is a maximum of about 0.5 dB and said isolation is a minimum of about 25 dB.
Claim 38
Dependent Claim
22 words
The method of claim 33 wherein coupling the bypass circuit comprises coupling two quarter wavelength lines in series to bypass said amplifier.
Claim 39
Dependent Claim
44 words
The method of claim 33 wherein said switching comprises coupling at least one diode in series with an input of said amplifier and biasing said diode into a conductive state with said control bias and into a nonconductive state by removing the control bias.
Claim 40
Dependent Claim
44 words
The method of claim 33 wherein said switching comprises coupling at least one diode in series with an output of said amplifier and biasing said diode into a conductive state with said control bias and into a nonconductive state by removing the control bias.
Claim 41
Dependent Claim
40 words
The method of claim 35 wherein said switching comprises coupling at least one diode from a junction of said quarter wavelength lines to a radio frequency ground, and biasing said diode into a nonconductive state by removing the control bias.
Claim 42
Dependent Claim
45 words
The method of claim 35 and further including coupling a DC blocking circuit in series between said two quarter wavelength lines and wherein said switching also uses at least one diode coupled from either side of said DC blocking circuit to a radio frequency ground.
Claim 43
Dependent Claim
49 words
The method of claim 33 wherein said switching comprises coupling at least one diode in series with each of an input and an output of said amplifier and biasing said diodes into a conductive state with the control bias and into a nonconductive state by removing the control bias.
Claim 44
Dependent Claim
31 words
The method of claim 36 and wherein said biasing includes coupling a quarter wavelength line between a control bias and an electrode of the diode at the input of said amplifier.
Claim 45
Dependent Claim
31 words
The method of claim 37 and wherein said biasing includes coupling a quarter wavelength line between a control bias and an electrode of the diode at the output of said amplifier.
Claim 46
Dependent Claim
34 words
The method of claim 35 wherein said coupling further includes coupling a third quarter wavelength line between said input and said output of said amplifier and in series with said two quarter wavelength lines.
Claim 47
Dependent Claim
34 words
The method of claim 36 wherein the switching includes coupling a resonant circuit with said diode to resonate with the diode so as to minimize the impedance of the diode in an off state.
Claim 48
Dependent Claim
34 words
The method of claim 37 wherein the switching includes coupling a resonant circuit with said diode to resonate with the diode so as to minimize the impedance of the diode in an off state.
Claim 49
Dependent Claim
34 words
The method of claim 38 wherein the switching includes coupling a resonant circuit with said diode to resonate with the diode so as to minimize the impedance of the diode in an on state.
Claim 50
Dependent Claim
49 words
The method of claim 38 wherein the switching comprises coupling multiple diodes from junctions of said quarter wavelength lines to radio frequency ground and coupling multiple resonant circuits with the diodes to resonate with the diodes so as to minimize the impedance of the diodes in an on state.
Claim 51
Dependent Claim
20 words
The method of claim 33 wherein said insertion loss is about 0.15 dB and said isolation is about 60 dB.
Claim 52
Dependent Claim
92 words
A zero-bias bypass apparatus for bypassing an amplifier comprising: a bypass circuit having a path configured for coupling between an input and an output of an amplifier, the bypass circuit comprising two quarter wavelength lines coupled in series to bypass the amplifier; and a switching circuit coupled with said bypass circuit and configured for coupling with the amplifier, said switching circuit comprising at least one solid state device, the switching circuit being responsive to absence of a control bias for switching an RF input signal from said amplifier to said bypass circuit.
Claim 53
Dependent Claim
92 words
A zero-bias bypass apparatus for bypassing an amplifier comprising: a bypass circuit having a path configured for coupling between an input and an output of an amplifier, the bypass circuit comprising two quarter wavelength lines coupled in series to bypass the amplifier; and a switching circuit coupled with said bypass circuit and configured for coupling with the amplifier, said switching circuit comprising at least one solid state device, the switching circuit being responsive to absence of a control bias for switching an RF input signal from said amplifier to said bypass circuit.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 2007-03-02 | 2007-09-01 | 2008-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2011-03-02 | 2011-09-01 | 2012-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2015-03-02 | 2015-09-01 | 2016-03-02 | $7700.00 | Window Closed / Lapsed |