5g standard source high frequency crystal oscillator circuit
A crystal oscillator circuit and standard source technology, applied to electrical components, power oscillators, etc., can solve problems such as being easily affected by temperature, clock frequency error, and clock frequency difficult to meet the standard, so as to achieve less clutter and reduce more clutter , Automatically filter the effect of clutter
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Embodiment 1
[0045] Embodiment 1: A 5G standard source high-frequency crystal oscillator circuit, such as figure 1 As shown, the crystal oscillator control circuit 1 includes a clock reference unit 11 , a high frequency crystal oscillator unit 13 and a PLL loop control unit 12 .
[0046] like figure 1 and figure 2 As shown, the clock reference unit 11 includes a programmable all-silicon temperature-compensated oscillator 111, and the type of the programmable all-silicon temperature-compensated oscillator 111 can be set to MEMS-20MHz. The VC port of the programmable all-silicon temperature-compensated oscillator 111 is electrically connected to a control terminal VC1, which is used to connect to an external CPU, and the CPU can output clock pulses to the control terminal VC1. The GND port of the programmable all-silicon temperature-compensated oscillator 111 is grounded, and the VCC port of the programmable all-silicon temperature-compensated oscillator 111 is electrically connected to a...
Embodiment 2
[0054] Embodiment 2: A 5G standard source high-frequency crystal oscillator circuit, such as image 3 As shown, the crystal oscillator control circuit 1 further includes an aging compensation unit 14 . The aging compensation unit 14 is connected to the clock reference unit 11 . The aging compensation unit 14 includes a voltage-controlled temperature-compensated oscillator 141 that transmits an aging compensation signal to the programmable all-silicon temperature-compensated oscillator 111 . The aging compensation unit 14 continuously increases the aging compensation signal from the time when the crystal oscillator control circuit 1 starts to use, and the aging compensation signal adjusts the clock frequency Vout1 output by the clock reference unit 11 .
[0055] The crystal oscillator control circuit 1 will inevitably age continuously during use. In particular, the aging speed of the voltage-controlled oscillator 131 will be slightly faster than the programmable all-silicon tem...
Embodiment 3
[0056] Embodiment 3: A 5G standard source high-frequency crystal oscillator circuit, such as Figure 4 and Figure 6 As shown, the crystal oscillator control circuit 1 also includes a pre-temperature compensation unit 15 . The pre-temperature compensation unit 15 includes a plurality of interconnected temperature compensation modules 151 , and the temperature compensation modules 151 are connected to the clock reference unit 11 .
[0057] like Figure 5 and Figure 6 As shown, each temperature compensation module 151 includes an operational amplifier 1511, the negative input terminal of the operational amplifier 1511 is electrically connected to a thermistor 1512, and the positive input terminal of the operational amplifier 1511 is electrically connected to an adjustable potentiometer 1513. The output terminal of 1511 is electrically connected to the programmable all-silicon temperature compensated oscillator 111 . The pre-temperature compensation unit 15 detects the ambie...
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