A High-Precision High-Frequency Ring Oscillator Circuit
A ring oscillator and oscillator technology, which is applied in the field of high-precision high-frequency ring oscillator circuits, can solve the problems of increasing system complexity, reducing system costs, and large total system area, and achieves solving technical obstacles, adjustable frequency multipliers, high precision effect
Active Publication Date: 2018-03-06
上海菱沃铂智能技术有限公司
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Problems solved by technology
Although this kind of closed-loop control system can obtain extremely high-precision high-frequency oscillation, it must provide an additional reference oscillation, which increases the complexity of the system, and the total area of the system is large, which is not conducive to reducing system cost
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[0020] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments. This embodiment is carried out on the premise of the technical solution of the present invention, and detailed implementation and specific operation process are given, but the protection scope of the present invention is not limited to the following embodiments.
[0021] Such as figure 2 As shown, a high-precision high-frequency ring oscillator circuit, the oscillator circuit includes a frequency-voltage converter I, a filter II, a frequency divider III and a voltage-controlled oscillator IV, and the output of the frequency-voltage converter I is connected to the filter II , the output of the filter II is connected to the voltage-controlled oscillator IV, the output of the voltage-controlled oscillator IV is connected to the outside of the circuit to provide high-frequency oscillation, and the feedback output is connected to the frequency divi...
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The invention relates to a high-precision high-frequency ring oscillator circuit, the oscillator circuit includes a frequency-voltage converter, a filter, a frequency divider and a voltage-controlled oscillator, the output of the frequency-voltage converter is connected to the filter, and the filter The output of the voltage-controlled oscillator is connected to a voltage-controlled oscillator, and the output of the voltage-controlled oscillator is connected to the outside of the circuit to provide high-frequency oscillation, while the feedback output is connected to a frequency divider, and the output of the frequency divider is connected to a frequency-voltage converter. The frequency-to-voltage converter outputs a control signal by comparing the frequency of the input signal of the frequency divider with the set frequency. Compared with the prior art, the present invention has the advantages of small design difficulty, high design efficiency, simple use, low cost and the like.
Description
technical field [0001] The invention relates to a high-frequency ring oscillator circuit, in particular to a high-precision high-frequency ring oscillator circuit. Background technique [0002] Traditional ring oscillators use an odd number of inverting delay structures in series to form a ring to obtain a certain frequency of oscillation. If you want to obtain a high-precision oscillation frequency, you need to ensure that the delay of each stage is as equal as possible under various working conditions (temperature, power supply, process changes, etc.), that is, the delay deviation should be small; if the required oscillation frequency is higher, Calculated according to the same accuracy percentage, the requirement for this deviation is even more stringent. For example, if the oscillation frequency is above 30MHz and the accuracy is required to be 1%, the total delay deviation is less than 0.3ns. This indicator is difficult to achieve when the working conditions change grea...
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IPC IPC(8): H03L7/18
Inventor 陈云龑
Owner 上海菱沃铂智能技术有限公司