Low-glitch current switching circuit applicable to real-time dynamic feedback loop

Abstract

The invention discloses a low-glitch current switching circuit applicable to a real-time dynamic feedback loop. The low-glitch current switching circuit comprises a current switch, a programmable control voltage Vclose generation circuit, a programmable logic control voltage Vopen generation circuit, a variable capacitor array, a voltage selector switch, a resistor and two programmable current sources. When the voltage selector switch is connected with a node 1, the programmable logic control voltage Vopen generation circuit charges or discharges a capacitor array C through the resistor R and the current source I1, real-time control voltage Vc reaches voltage Vopen, the current switch is on, and current is off; when the voltage selector is connected with a node 2, the programmable control voltage Vclose generation circuit discharges or charges the capacitor array C through the current source I2, real-time control voltage Vc reaches voltage Vclose, the current switch is off, and current is on. The programmable control voltage Vclose generation circuit has the advantages that switching caused glitch is low, and circuit design is highly flexible.

Description

technical field [0001] The invention mainly relates to a current switch circuit, in particular to a low glitch current switch circuit applied to a real-time dynamic feedback loop, and belongs to the field of electronic circuit design. Background technique [0002] With the continuous development of integrated circuit technology and technology, the integration of SoC (System on Chip) is getting higher and higher. In addition to integrating analog and digital circuits with low operating frequency, radio frequency circuits with high operating frequency are also integrated into SoC. come. Among the SoCs that integrate radio frequency, analog and digital circuits on a single chip, the most widely used and most demanding SoCs are used for data wireless transmission and reception, especially SoCs that use frequency or phase modulation. In a frequency or phase modulated wireless transceiver system, in order to facilitate demodulation and reduce the error probability when receiving ...

AI Technical Summary

Problems solved by technology

[0006] The problem to be solved by the present invention: Aiming at the technical problem that when the existing conventional current switch circuit is applied to the real-time dynamic feedback loop, the switching glitches will be introduced to affect the accuracy of the circuit. Loop low glitch current switching circuit

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