CN112865768A - PIN pipe high-voltage switch for frequency hopping filter - Google Patents
PIN pipe high-voltage switch for frequency hopping filter Download PDFInfo
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- CN112865768A CN112865768A CN202110349996.7A CN202110349996A CN112865768A CN 112865768 A CN112865768 A CN 112865768A CN 202110349996 A CN202110349996 A CN 202110349996A CN 112865768 A CN112865768 A CN 112865768A
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- frequency hopping
- current
- control signal
- voltage switch
- hopping filter
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K17/00—Electronic switching or gating, i.e. not by contact-making and –breaking
- H03K17/08—Modifications for protecting switching circuit against overcurrent or overvoltage
- H03K17/082—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit
- H03K17/0822—Modifications for protecting switching circuit against overcurrent or overvoltage by feedback from the output to the control circuit in field-effect transistor switches
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Abstract
The invention provides a PIN high-voltage switch for a frequency hopping filter, wherein an emitter of Q3 is connected with +200V, a base is connected with a collector of Q2, and the collector is connected with the base of Q2 through R6 and R4; one end of R2 is connected with L1, the other end is connected with the emitter of Q2 and the anode of D1, and the cathode of D1 is connected with the collector of Q1; the anode of D2 is connected with +3.3V, and the cathode is connected with C2; and the switching value control signal input module is also connected and used for inputting the switching value control signal. The invention has the beneficial effects that: a PIN tube high-voltage switch for a frequency hopping filter adopts a pull-up resistor with a large resistance value, only weak pull-up current is needed when the output of the switch is low level, and high-voltage power supply current is reduced when the output of the switch is low level, so that the power consumption of a system is reduced.
Description
Technical Field
The invention belongs to the technical field of frequency hopping filters, and particularly relates to a PIN tube high-voltage switch for a frequency hopping filter.
Background
In the current frequency hopping filter, the contradiction between the switch transmission delay and the pull-up current exists in the control of the PIN diode: if the pull-up current is to be reduced, the pull-up resistance is to be increased, so that the rise time of a high level is increased, and the transmission delay of the switch is increased; if the rise time of the high level is reduced and the transmission delay of the switch is reduced, the pull-up resistance is reduced, which causes the pull-up current to be increased.
The pull-up resistor is too large, so that the switching delay of the PIN tube switch is increased, the frequency hopping rate is reduced, and the pull-up resistor is too small; if the pull-up resistance is too small, the power consumption of the frequency hopping filter is increased, the circuit heating is increased, and the service time of the system is shortened.
Disclosure of Invention
In view of this, the present invention is directed to provide a PIN tube high voltage switch for a frequency hopping filter, in which only a weak pull-up current is required when a low level is output through a totem-pole structure of a pull-up circuit, and in a rising edge process, the pull-up current is rapidly increased through a self-feedback characteristic of the totem-pole, so that a transmission delay of the switch is greatly reduced, and an upper limit of a frequency hopping rate of a system is improved.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a PIN tube high-voltage switch for a frequency hopping filter comprises resistors R2, R3, R4, R6, capacitors C1 and C2, diodes D1 and D2, an NPN type triode Q2, a PNP type triode Q3 and an L1, wherein D2 is the PIN tube switch needing to be controlled, C2 is a capacitor bank capacitor of the frequency hopping filter, and L1 is a high-frequency signal isolation inductor;
the emitter of Q3 is connected with +200V, the base is connected with the collector of Q2, and the collector is connected with the base of Q2 through R6 and R4;
one end of R2 is connected with L1, the other end is connected with the emitter of Q2 and the anode of D1, and the cathode of D1 is connected with the collector of Q1;
the anode of D2 is connected with +3.3V, and the cathode is connected with C2;
and the switching value control signal input module is also connected and used for inputting the switching value control signal.
Further, the switching value control signal input module comprises an NPN type triode Q1, one end of the R3 is connected with +200V, the other end of the R3 is connected with a collector of the Q1, a base of the Q1 is connected with a control signal through the R5, and an emitter of the Q1 is grounded.
Further, the switching value control signal input module comprises an NMOS Q1, one end of the R3 is connected with +200V, the other end of the R3 is connected with a drain D of the NMOS Q1, a grid G is connected with a control signal through the R5, and a source S is grounded.
Further, a totem pole structure composed of an NPN type triode Q2 and a PNP type triode Q3 is used for providing a fast pull-up current of a rising edge.
Further, a pull-up resistor R3 is used to provide a weak pull-up current.
Further, the input control signal is amplified and inverted through an NPN triode or an MOS tube, and the amplified and inverted signal is isolated through a diode.
Further, when the control signal is at a high level, the transistor Q1 is turned on, and outputs a low level, so that when the switch is in a conducting state, the current passes through D2, L1, R2, D1, and Q1 from +3.3V to ground, the transistors Q2 and Q3 are all in a cut-off state, no current flows, and only the pull-up resistor R3 has a weak pull-up current.
Further, when the control signal changes from high level to low level, the triode Q1 is cut off, the base current of the triode Q2 is supplied by R3, the collector current amplified by Q2 is supplied to Q3 as the base current, and the collector current amplified by Q3 is fed back to the base of Q2, so that avalanche amplification is realized, the pull-up current rises rapidly, and the purpose of reducing the transmission delay of the switch is achieved.
Further, when the control signal is converted from the low level to the high level, the transistor Q1 is turned on, and the base voltage of the transistor Q2 is pulled down, so that the transistor Q2 is turned off, the transistor Q2 is turned off, and the collector has no output current to turn off the transistor Q3, thereby realizing the conversion from the high level to the low level.
Compared with the prior art, the PIN tube high-voltage switch for the frequency hopping filter has the following beneficial effects:
(1) the PIN tube high-voltage switch for the frequency hopping filter adopts the pull-up resistor with larger resistance value, only needs weak pull-up current when the output of the switch is low level, reduces the high-voltage power supply current when the switch outputs low level, reduces the power consumption of the system, and enables the pull-up current to be rapidly increased through the self-feedback characteristic of the totem pole in the rising edge, thereby reducing the transmission delay of the switch and improving the upper limit of the frequency hopping rate of the system.
(2) According to the PIN tube high-voltage switch for the frequency hopping filter, during the period that the output of the switch is converted from the low level to the high level, through the self-feedback structure of the totem pole, the avalanche increase of the pull-up current is caused, the level is rapidly increased, the switch can rapidly output the high level, and the transmission delay of the switch is reduced;
(3) the PIN tube high-voltage switch for the frequency hopping filter can be applied to PIN tube high-voltage switch control of the frequency hopping filter and can also be applied to other systems needing high-voltage switch control.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate an embodiment of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic diagram of a PIN high-voltage switch for a triode-input frequency-hopping filter according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a PIN high-voltage switch for a MOS transistor input frequency-hopping filter according to an embodiment of the present invention.
Detailed Description
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A PIN tube high-voltage switch for a frequency hopping filter comprises resistors R2, R3, R4, R6, capacitors C1 and C2, diodes D1 and D2, an NPN type triode Q2, a PNP type triode Q3 and an L1, wherein D2 is the PIN tube switch needing to be controlled, C2 is a capacitor bank capacitor of the frequency hopping filter, and L1 is a high-frequency signal isolation inductor;
the emitter of Q3 is connected with +200V, the base is connected with the collector of Q2, and the collector is connected with the base of Q2 through R6 and R4;
one end of R2 is connected with L1, the other end is connected with the emitter of Q2 and the anode of D1, and the cathode of D1 is connected with the collector of Q1;
the anode of D2 is connected with +3.3V, and the cathode is connected with C2;
and the switching value control signal input module is also connected and used for inputting the switching value control signal.
The switching value control signal input module comprises an NPN type triode Q1, one end of the R3 is connected with +200V, the other end of the R3 is connected with a collector of the Q1, a base of the Q1 is connected with a control signal through the R5, and an emitter of the Q1 is grounded.
The switching value control signal input module comprises an NMOS Q1, one end of an R3 is connected with +200V, the other end of the R3 is connected with a drain D of an NMOS Q1, a grid G is connected with a control signal through an R5, and a source S is grounded.
The totem pole structure composed of the NPN type triode Q2 and the PNP type triode Q3 is used for providing the fast pull-up current of the rising edge.
Pull-up resistor R3 is used to provide a weak pull-up current.
The input control signal is amplified and inverted through an NPN triode or an MOS tube, and the amplified and inverted signal is isolated through a diode.
Please refer to fig. 1, which is a schematic diagram of a PIN high-voltage switch for a frequency hopping filter according to the present invention. The method can be applied to PIN tube high-voltage switch control of a frequency hopping filter and can also be applied to other systems needing high-voltage switch control.
As shown in fig. 1: the typical structure of the circuit consists of 2 NPN triodes, 1 PNP triode, a diode and a plurality of resistance capacitors.
Wherein D2 is a PIN tube switch to be controlled, C2 is a capacitor bank capacitor of the frequency hopping filter, and L1 is a high-frequency signal isolation inductor.
When the control signal is high, the transistor Q1 is turned on, outputting a low level, and the switch is turned on. The current now goes from +3.3V through D2, L1, R2, D1, Q1 to ground. The transistors Q2 and Q3 are both in an off state and have no current, and only the pull-up resistor R3 has weak pull-up current.
When the control signal changes from high to low, the transistor Q1 turns off, the base current of the transistor Q2 starts to be supplied by R3, and the collector current amplified by Q2 is supplied to Q3 as the base current. The collector current amplified by the Q3 is fed back to the base of the Q2, so that avalanche amplification is realized, the pull-up current is rapidly increased, and the purpose of reducing the transmission delay of the switch is achieved.
When the control signal changes from low level to high level, the transistor Q1 is turned on, and the base voltage of Q2 is pulled down, so that Q2 is turned off. Q2 turns off, and no output current at the collector turns Q3 off as well. A high to low conversion is achieved.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. The utility model provides a PIN pipe high voltage switch for frequency hopping filter which characterized in that: the frequency hopping filter comprises resistors R2, R3, R4 and R6, capacitors C1 and C2, diodes D1 and D2, an NPN type triode Q2 and a PNP type triode Q3, and also comprises an L1, wherein D2 is a PIN tube switch needing to be controlled, C2 is a capacitor bank capacitor of the frequency hopping filter, and L1 is a high-frequency signal isolation inductor;
the emitter of Q3 is connected with +200V, the base is connected with the collector of Q2, and the collector is connected with the base of Q2 through R6 and R4;
one end of R2 is connected with L1, the other end is connected with the emitter of Q2 and the anode of D1, and the cathode of D1 is connected with the collector of Q1;
the anode of D2 is connected with +3.3V, and the cathode is connected with C2;
and the switching value control signal input module is also connected and used for inputting the switching value control signal.
2. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 1, wherein: the switching value control signal input module comprises an NPN type triode Q1, one end of the R3 is connected with +200V, the other end of the R3 is connected with a collector of the Q1, a base of the Q1 is connected with a control signal through the R5, and an emitter of the Q1 is grounded.
3. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 2, wherein: the switching value control signal input module comprises an NMOS Q1, one end of an R3 is connected with +200V, the other end of the R3 is connected with a drain D of an NMOS Q1, a grid G is connected with a control signal through an R5, and a source S is grounded.
4. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 1, wherein: the totem pole structure composed of the NPN type triode Q2 and the PNP type triode Q3 is used for providing the fast pull-up current of the rising edge.
5. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 1, wherein: pull-up resistor R3 is used to provide a weak pull-up current.
6. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 3, wherein: the input control signal is amplified and inverted through an NPN triode or an MOS tube, and the amplified and inverted signal is isolated through a diode.
7. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 2, wherein: when the control signal is at high level, the triode Q1 is turned on, and outputs low level, so that when the switch is in on state, the current passes from +3.3V to ground through D2, L1, R2, D1 and Q1, the triodes Q2 and Q3 are all in off state and have no current, and only the pull-up resistor R3 has weak pull-up current.
8. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 2, wherein: when the control signal is changed from high level to low level, the triode Q1 is cut off, the base current of the triode Q2 is provided by the R3, the collector current amplified by the Q2 is provided for the Q3 to be used as the base current, and the collector current amplified by the Q3 is fed back to the base of the Q2, so that the avalanche amplification is realized, the pull-up current is quickly increased, and the purpose of reducing the transmission delay of the switch is achieved.
9. The PIN high-voltage switch for the frequency hopping filter as claimed in claim 2, wherein: when the control signal is converted from the low level to the high level, the triode Q1 is switched on, the base voltage of the Q2 is pulled down, the Q2 is cut off, the Q2 is cut off, and the collector has no output current to cut off the Q3, so that the conversion from the high level to the low level is realized.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110349996.7A CN112865768A (en) | 2021-03-31 | 2021-03-31 | PIN pipe high-voltage switch for frequency hopping filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110349996.7A CN112865768A (en) | 2021-03-31 | 2021-03-31 | PIN pipe high-voltage switch for frequency hopping filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112865768A true CN112865768A (en) | 2021-05-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110349996.7A Pending CN112865768A (en) | 2021-03-31 | 2021-03-31 | PIN pipe high-voltage switch for frequency hopping filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112865768A (en) |
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2021
- 2021-03-31 CN CN202110349996.7A patent/CN112865768A/en active Pending
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