Unlock instant, AI-driven research and patent intelligence for your innovation.

Polarization voltage setting of microphones

A polarization voltage, microphone technology, applied in the direction of electrical components, electrostatic sensors, electrostatic transducer microphones, etc., can solve the problems of compensation, impossible sensitivity tolerance, etc., and achieve the effect of cost saving

Active Publication Date: 2005-10-05
AKG ACOUSTICS
View PDF5 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It is also not possible to compensate for sensitivity tolerances in the case of different directional characteristics

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 more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Polarization voltage setting of microphones
  • Polarization voltage setting of microphones
  • Polarization voltage setting of microphones

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0038] figure 1 Shown is a block diagram of the main elements of a microphone according to the invention. The phantom power supply of the microphone as shown in FIG. 5 is carried out by the phantom power supply unit 31 via feed resistors 32, 33 of the same magnitude, which are arranged in the mixing table or in front of the mixing table, for example on the XLR plug. Back of 3-pole plug 4. Figure 5 shows such a phantom power supply. According to this standard, three phantom power supplies are possible: The relevant values ​​of the feed resistors for 12-V, 24-V or 48-V supplies are 680Ω, 1.2kΩ or 6.8kΩ respectively. Here lines 1 and 2 represent the cable conductors powered by the phantom power unit; line 3 represents the ground wire which is normally connected to the ground cable shield. Via the audio cable, ie via lines 1 , 2 and resistors 5 and 6 , phantom power unit 31 is connected to the input of power supply circuit 11 according to the invention. Capacitor 7 smoothes th...

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

No PUM Login to View More

Abstract

The invention relates to a capacitor microphone comprising at least one microphone capsule (9). The invention is characterized in that the capacitor microphone comprises at least one circuit for regulating the polarization voltage, where the circuit for the regulation of the polarization voltage comprises an analog regulation loop (48) supplied with an unregulated voltage, and a digital regulation loop (47), in that the digital regulation loop (47) comprises a control electronics (39), for example a microcontroller or a CPLD, that provides, to the analog regulation loop (48), a desired value for the polarization voltage, which is calculated using correction factors, and in that, for the purpose of feedback, the output of the analog regulation loop (48) is connected with a control electronics (39).

Description

technical field [0001] The invention relates to a circuit for polarizing voltage compensation of a capacitor microphone. Background technique [0002] Power supply for microphones is conventionally provided by a power supply, for example using a mixer. During phantom powering, the positive pole of the feed voltage is achieved through two identical feed-line resistors on the two cable conductors of the audio cable. The return current flows through a third conductor connected to the electrical connector 1 of the XLR plug. In order to efficiently use the voltage supplied when powering the phantom power supply of a condenser microphone, the current consumption of the microphone should be as small as possible in order to prevent excessive voltage drops across the feeder resistance. A condenser microphone with 48-V has a maximum current draw of 10 mA. This phantom power supply is standardized here according to DIN EN 61938 (formerly IEC 268). [0003] Microphones mainly use co...

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
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04R3/06H04R19/00H04R19/04
CPCH04R19/04
Inventor I·W·朗
Owner AKG ACOUSTICS