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Single-ended amplitude detector and single-ended amplitude detecting unit

A detector and amplitude technology, applied in the design field of single-ended amplitude detection circuits, can solve problems such as poor consistency, and achieve the effects of small process deviation, easy analysis, and simple circuit structure

Active Publication Date: 2013-07-17
NATIONZ TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the detection characteristics of this single-ended amplitude detector are greatly affected by the process and temperature, and the consistency is poor

Method used

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  • Single-ended amplitude detector and single-ended amplitude detecting unit
  • Single-ended amplitude detector and single-ended amplitude detecting unit
  • Single-ended amplitude detector and single-ended amplitude detecting unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Such as Picture 10 In the single-ended amplitude detector structure shown, two sets of current mirror circuit units are used in this embodiment. In the first group of current mirror units, the first current mirror mirror terminal circuit is a mirror circuit of the first current mirror source terminal circuit. In the second group of current mirror units, the second current mirror mirror terminal circuit is a mirror circuit of the second current mirror source terminal circuit. The two sets of current mirror circuit units are respectively arranged on the DC voltage input circuit, the AC current generating circuit and the current amplifying and filtering circuit. The direct current voltage input circuit includes a first current mirror source terminal circuit and a current source connected to each other. The alternating current generating circuit includes a first current mirror mirror terminal circuit. The current amplifying and filtering circuit includes a second current ...

Embodiment 2

[0061] reference Picture 11 The amplitude detector circuit shown. In the figure, the PMOS tube Mp1 and the current source form the DC voltage input circuit; R1 and C1 form the first RC circuit; the PMOS tube Mp2 is the AC current generating circuit; the NMOS tube Mn1, R2, C2, and the NMOS tube Mn2 form the current amplification filter Circuit, where R2 and C2 form a second RC circuit; PMOS tube Mp3 is a DC voltage output circuit. The voltage difference on the PMOS tube Mp3 is the output signal Vout of the amplitude detector. The input signal Vin is superimposed with the output DC voltage signal of the first RC circuit through the DC blocking capacitor Cc. In addition, a bypass capacitor C3 can be set in the AC current generating circuit in the circuit.

[0062] When there is no input signal, the PMOS tubes Mp1 and Mp2 form a 1:1 current mirror, and the NMOS tubes Mn1 and Mn2 form a 1:M current mirror. The first RC circuit formed by the resistor R1 and the capacitor C1, viewed...

Embodiment 3

[0094] Such as Figure 13 As shown, the NMOS and PMOS in the second embodiment are interchanged, power and ground are interchanged, and the circuit is inverted to form a Picture 11 Fully symmetrical amplitude detector. The circuit design method, analysis and description are the same as the aforementioned Picture 11 The circuit is exactly the same, so I won't repeat it here.

[0095] Figure 14 Given the use of two amplitude detectors proposed by the present invention ( Picture 11 or Figure 13 The structure shown) constitutes a new amplitude detection unit. The amplitude detector 1 receives the external input signal, and the output is connected to the non-inverting input terminal of the subtractor / amplifier. The input of the amplitude detector 2 is grounded, and the output is connected to the inverting input terminal of the subtractor / amplifier. The subtraction / amplifier subtracts the input voltage, amplifies and outputs the voltage difference, and the amplification factor is...

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Abstract

The invention discloses a single-ended amplitude detector and a single-ended amplitude detecting unit. The single-ended amplitude detector comprises a direct-current voltage input circuit, a first resistor capacitor (RC) circuit, an alternating-current generating circuit, a current amplification filter circuit and a direct-current voltage output circuit. Effects of process constants with a large deviation on amplitude detection results are offset through circuit design, residual process deviations in the circuits are small, and accordingly, the process deviations of the amplitude detection results are relatively small. The ingle-ended amplitude detector and the single-ended amplitude detecting unit have the advantages that the detection characteristic consistency is good, the circuits are simple in structure and easy to analyze and design, and the like.

Description

Technical field [0001] The invention relates to an integrated circuit design technology, in particular to the design of a single-ended amplitude detection circuit. Background technique [0002] Amplitude Detector, also known as Peak Detector, is a circuit that detects the amplitude of a signal and outputs a DC voltage (or current) corresponding to the signal amplitude. The output voltage (or current) of the amplitude detector must be monotonic with the amplitude of the input signal, that is to say, when the amplitude of the input signal increases, the output voltage (or current) must monotonously increase or decrease, so as to ensure The output voltage (or current) has a one-to-one correspondence with the input signal amplitude. Such as figure 1 Shown is a schematic diagram of the AC signal to be detected. The amplitude of the AC signal in the figure is A. figure 2 The working principle diagram of the amplitude detector, the AC signal to be detected is input to the amplitude de...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/04
Inventor 许建超史爱焕
Owner NATIONZ TECH INC