Volume adjustment control module without transmission distortion
A volume adjustment and control module technology, applied in the direction of amplification control, electrical components, volume compression/expansion, etc., can solve the problems of volume control noise, poor distortion, changing transmission impedance and cost issues, etc., to achieve volume control Controlled, structured and simple effects
Active Publication Date: 2015-03-11
WUXI YOUDA ELECTRONICS
View PDF3 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
[0002] With the rapid development of integrated circuits, the previous simple resistor-divided volume control method has been eliminated because it will change the transmission impedance and cost issues. Now a large number of popular integrated active volume control methods, and the integrated volume control method and It is divided into digital mode and analog mode. The digital control volume mode cannot subdivide the volume step indefinitely, which will cause volume control noise; the analog volume mode has become the first choice for high-performance audio processing, but today's integrated DC volume control mode The circuit adopts an open-loop control method, the DC voltage directly controls the comparator, and the transconductance ratio control part is also an open-loop operation, so most of the distortion is not very good, and it is impossible to achieve distortion-free transmission
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment Construction
[0015] figure 1 Shown is a volume adjustment control module without transmission distortion, including an operational amplifier module A1, a voltage conversion current resistor RES1, a volume controlled unit VOL, a volume control conversion module A4, a first output resistor RES2, a second output resistor RES3, The first power amplifier A2 and the second power amplifier A3; the operational amplifier module A1 is connected to the volume controlled unit VOL through the voltage conversion current resistor RES1, and is used to isolate the input signal from the volume control unit VOL; the voltage conversion current The resistor RES1 and the volume controlled unit VOL form a closed-loop transconductance amplifier, which is used to convert the input voltage signal into a current signal as a reference signal for volume control; the output signal of the volume control conversion module A4 is used to control the The output current of the volume controlled unit VOL; the output current o...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
Login to View More Abstract
The invention discloses a volume adjustment control module without transmission distortion. The volume adjustment control module without transmission distortion comprises an operational amplifier module, a voltage convert current resistance, a volume controlled unit, a volume control conversion module, a first output resistance, a second output resistance, a first power amplifier and a second power amplifier. The operational amplifier module is connected with the volume controlled unit through the voltage convert current resistance. A closed loop transconductance amplifier is formed by the voltage convert current resistance and the volume controlled unit. An output signal of the volume control conversion module is used for controlling an output current of the volume controlled unit. The output current of the volume controlled unit is converted to a voltage signal after respectively flowing through the first output resistance and second output resistance, and the voltage signal is output after amplified by the first power amplifier and the second power amplifier which are respectively connected with the first output resistance and second output resistance. The circuit uses full-closed loop control to achieve volume control of ultra-low distortion transmission.
Description
technical field [0001] The invention relates to a volume adjustment control module without transmission distortion. Background technique [0002] With the rapid development of integrated circuits, the previous simple resistor-divided volume control method has been eliminated because it will change the transmission impedance and cost issues. Now a large number of popular integrated active volume control methods, and the integrated volume control method and It is divided into digital mode and analog mode. The digital control volume mode cannot subdivide the volume step indefinitely, which will cause volume control noise; the analog volume mode has become the first choice for high-performance audio processing, but today's integrated DC volume control mode The circuit adopts an open-loop control method, the DC voltage directly controls the comparator, and the transconductance ratio control part is also open-loop, so most of the distortion is not very good, and it is impossible t...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): H03G7/00H03F3/68
Inventor 雍广虎王海兵
Owner WUXI YOUDA ELECTRONICS