High-low voltage switching control circuit of frequency hopping filter
By designing a simplified high and low voltage switching control circuit for frequency hopping filters, using multiple diodes and a small number of resistors and transistors, the problem of large volumes of frequency hopping filter components is solved, and the number of components and manufacturing costs are reduced.
Patent Information
- Application Number
- CN202421747724.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-23
- Publication Date
- 2025-05-09
- Estimated Expiration
- 2034-07-23
AI Technical Summary
There are many frequency hopping filter components, which leads to large volumes and affects the volume of the communication module.
Design a high and low voltage switching control circuit for frequency hopping filters. By using one more secondary tube, one resistor and one transistor are reduced, the circuit structure is simplified, and the switching between high and low voltages is achieved.
The high and low voltage control circuits of the frequency hopping filter are simplified, the number of components is reduced, the manufacturing cost is reduced, and the volume of the frequency hopping filter is reduced.
Smart Images
Figure CN222852262U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a high-low voltage switching control circuit for a frequency hopping filter, belonging to the technical field of filter components. Background Art
[0002] With the development of the times, the volume requirements for communication modules are getting smaller and smaller. As an important module in the communication system, the size of the frequency hopping filter directly affects the volume of the communication module. The more components used in the filter, the larger the filter volume. Figure 2 This is a control circuit for the voltage output of a frequency hopping filter. According to the circuit schematic, when S1 is "1", Q2 and Q3 are turned on, Q1 is turned off, and the output is 0±0.5V. At this time, D2 and D3 are turned on. When S1 is "0", Q2 and Q3 are turned off, Q1 is turned on, and the output is VDD±1V. At this time, D2 and D3 are not turned on. Through this circuit, the frequency hopping filter can realize the switching of high and low voltage (VDD and GND) outputs, meeting the level requirements of the control capacitor matrix.
[0003] The frequency hopping filter has 10 groups of capacitor matrices ( Figure 2 R6, R9, R10, D2, D3), 10 control circuits are required ( Figure 2 The frequency hopping filter consists of R1~R4, Q1~Q3, and uses many components inside, which is large in size and affects the size of the communication module. Utility Model Content
[0004] The technical problem to be solved by the utility model is to provide a high-low voltage switching control circuit for a frequency hopping filter, so as to solve the problem that the frequency hopping filter has many components and a large volume.
[0005] The technical solution adopted by the utility model is: a high-low voltage switching control circuit of a frequency hopping filter, comprising a resistor R5, a resistor R7, a resistor R8, a diode D1, a transistor Q4, a transistor Q6, a resistor R11, a resistor R12, a resistor R13, a diode D4 and a diode D5; a first gear end of a two-gear switch S2 is connected to the positive electrode of a power supply V2, a second gear end of the two-gear switch S2 is connected to the negative electrode of the power supply V2 and grounding, a common end of the two-gear switch S2 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the B pole of the transistor Q6, the E pole of the transistor Q6 is grounded, and the C pole of the transistor Q6 is connected The cathode of the diode D1, one end of the resistor R7 and the B electrode of the transistor Q4, the C electrode of the transistor Q4 is connected to one end of the resistor R8, the other end of the resistor R7 and the other end of the resistor R8 are connected to the voltage VDD end, the E electrode of the transistor Q4 is connected to the anode of the diode D1, one end of the resistor R11 and the cathode of the diode D4, the other end of the resistor R11 is connected to the anode of the diode D4, one end of the resistor R12 and the cathode of the diode D5, the other end of the resistor R12 and the anode of the diode D5 are connected to one end of the resistor R13, the other end of the resistor R13 is connected to the anode of the power supply V4, and the cathode of the power supply V4 is grounded.
[0006] Furthermore, the diode D1, the diode D4 and the diode D5 are of model 1N5719.
[0007] Furthermore, the transistor Q4 and the transistor Q6 are of model MMBT5551LT1.
[0008] The beneficial effects of the utility model are as follows: compared with the prior art, the utility model simplifies the high and low voltage control circuits of the frequency hopping filter by using one more diode and reducing the circuit design of one resistor and one transistor, realizes the function of 10 groups of control circuits required for 10 groups of capacitor matrices of the frequency hopping filter, controls the conduction and cutoff of the PIN diodes in the capacitor matrix, realizes the switching of the output high and low voltage, simplifies the circuit structure, reduces the number of components as a whole, reduces the size of the frequency hopping filter and reduces the manufacturing cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 This is the circuit diagram of the frequency hopping filter of the utility model;
[0010] Figure 2 This is the circuit diagram of the frequency hopping filter. DETAILED DESCRIPTION
[0011] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0012] A high-low voltage switching control circuit of a frequency hopping filter comprises a resistor R5, a resistor R7, a resistor R8, a diode D1, a transistor Q4, a transistor Q6, a resistor R11, a resistor R12, a resistor R13, a diode D4 and a diode D5; a first gear end of a two-gear switch S2 is connected to a positive electrode of a power source V2, a second gear end of the two-gear switch S2 is connected to a negative electrode of the power source V2 and grounded, a common end of the two-gear switch S2 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to a B pole of the transistor Q6, an E pole of the transistor Q6 is grounded, and a C pole of the transistor Q6 is connected to the diode D1 The negative electrode of transistor R11, one end of resistor R7 and the B electrode of transistor Q4, the C electrode of transistor Q4 is connected to one end of resistor R8, the other end of resistor R7 and the other end of resistor R8 are connected to the voltage VDD end, the E electrode of transistor Q4 is connected to the anode of diode D1, one end of resistor R11 and the negative electrode of diode D4, the other end of resistor R11 is connected to the anode of diode D4, one end of resistor R12 and the negative electrode of diode D5, the other end of resistor R12 and the anode of diode D5 are connected to one end of resistor R13, the other end of resistor R13 is connected to the positive electrode of power supply V4, and the negative electrode of power supply V4 is grounded.
[0013] Furthermore, the diode D1, the diode D4 and the diode D5 are of model 1N5719.
[0014] Furthermore, the transistor Q4 and the transistor Q6 are of model MMBT5551LT1.
[0015] The circuit principle of this scheme is as follows Figure 1 , Figure 1 The middle control circuit is composed of resistor R5, resistor R7, resistor R8, diode D1, transistor Q4, and transistor Q6, and the control capacitor matrix is composed of resistor R11, resistor R12, resistor R13, diode D4, and diode D5.
[0016] The resistor R5 is 4.7KΩ, the resistor R7 is 560KΩ, the resistor R8 is 470Ω, the resistor R11 is 2.2MΩ, the resistor R12 is 2.2MΩ, and the resistor R13 is 120Ω. The voltage of power supply V2 and power supply V4 is 3.3V
[0017] When switch S2 is "1" (when the first gear of the switch is connected to the positive pole of the power supply V2), transistor Q4 is cut off, diode D1 and transistor Q6 are turned on, and the output is a low voltage (0±1V). At this time, diode D4 and diode D5 are turned on.
[0018] When switch S2 is "0" (when the second gear of the switch is connected to the negative pole of the power supply V2 and grounded), transistor Q4 is turned on, diode D1 and transistor Q6 are turned off, and the output is a high voltage (VDD±1V). At this time, diode D4 and diode D5 are not turned on, meeting the level requirements of the control capacitor matrix.
[0019] Figure 1 Frequency hopping filter circuit can realize Figure 2 The function of the frequency hopping filter circuit is to control the conduction and cutoff of the PIN diode in the capacitor matrix. Figure 1 and Figure 2 The utility model uses one more diode to save one resistor and one triode, simplifies the circuit structure, reduces the number of components as a whole, reduces the size of the frequency hopping filter and reduces the manufacturing cost.
Claims
1. A frequency hopping filter high and low voltage switching control circuit, characterized in that: The invention comprises a resistor R5, a resistor R7, a resistor R8, a diode D1, a transistor Q4, a transistor Q6, a resistor R11, a resistor R12, a resistor R13, a diode D4 and a diode D5; a first gear end of a two-gear switch S2 is connected to the positive electrode of a power supply V2, a second gear end of the two-gear switch S2 is connected to the negative electrode of the power supply V2 and grounding, a common end of the two-gear switch S2 is connected to one end of the resistor R5, the other end of the resistor R5 is connected to the B pole of the transistor Q6, the E pole of the transistor Q6 is grounded, and the C pole of the transistor Q6 is connected to the negative pole of the diode D1, the One end is connected to the B pole of the transistor Q4, the C pole of the transistor Q4 is connected to one end of the resistor R8, the other end of the resistor R7 and the other end of the resistor R8 are connected to the voltage VDD end, the E pole of the transistor Q4 is connected to the anode of the diode D1, one end of the resistor R11 and the cathode of the diode D4, the other end of the resistor R11 is connected to the anode of the diode D4, one end of the resistor R12 and the cathode of the diode D5, the other end of the resistor R12 and the anode of the diode D5 are connected to one end of the resistor R13, the other end of the resistor R13 is connected to the anode of the power supply V4, and the cathode of the power supply V4 is grounded.
2. A frequency hopping filter high and low voltage switching control circuit according to claim 1, characterized in that: The diode D1, the diode D4 and the diode D5 are of model 1N5719.
3. A frequency hopping filter high and low voltage switching control circuit according to claim 1, characterized in that: The transistor Q4 and the transistor Q6 are of model MMBT5551LT1.