Systems and methods for providing an envelope tracking supply voltage
US-11923806-B2 · Mar 5, 2024 · US
Impedance converter circuit for condenser microphone
US9590570B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9590570-B2 |
| Application number | US-201514946269-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 19, 2015 |
| Priority date | Nov 28, 2014 |
| Publication date | Mar 7, 2017 |
| Grant date | Mar 7, 2017 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
To provide an impedance converter circuit for a condenser microphone which can secure a wide dynamic range using a voltage amplifier circuit. The impedance converter circuit is provided with: a first electron tube of a cathode grounded type in which an output signal of a condenser microphone unit is input into a grid and output from a plate; a second electron tube in which an output signal from the plate of the first electron tube is input into a grid and output from at least a cathode; and a feedback element configured to transmit a feedback signal from the cathode of the second electron tube to the grid of the first electron tube.
First claim
Opening claim text (preview).
What is claimed is: 1. An impedance converter circuit for a condenser microphone, comprising: a first electron tube of a cathode grounded type in which an output signal of a condenser microphone unit is input into a grid and output from a plate; a second electron tube in which an output signal from the plate of the first electron tube is input into a grid and output from at least a cathode; and a feedback element configured to transmit a feedback signal from the cathode of the second electron tube to the grid of the first electron tube. 2. The impedance converter circuit for a condenser microphone according to claim 1 , wherein the feedback element is constituted of a condenser element. 3. The impedance converter circuit for a condenser microphone according to claim 2 , wherein the second electron tube constitutes a PK division circuit in which a plate and the cathode of the second electron tube are respectively connected with load resistances and provide signals having phases reverse to each other, which are output as balanced output signals of a condenser microphone. 4. The impedance converter circuit for a condenser microphone according to claim 1 , wherein the second electron tube constitutes a PK division circuit in which a plate and the cathode of the second electron tube are respectively connected with load resistances and provide signals having phases reverse to each other, which are output as balanced output signals of a condenser microphone. 5. The impedance converter circuit for a condenser microphone according to claim 1 , wherein the first and second electron tubes are constituted of a triode electron tube.
Assignees
Inventors
Classifications
of electrostatic transducers · CPC title
Amplifiers with both discharge tubes and semiconductor devices as amplifying elements · CPC title
Microphones (H04R19/01 takes precedence) · CPC title
- H03F1/56Primary
Modifications of input or output impedances, not otherwise provided for · CPC title
the amplifier being designed for audio applications · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US9590570B2 cover?
- To provide an impedance converter circuit for a condenser microphone which can secure a wide dynamic range using a voltage amplifier circuit. The impedance converter circuit is provided with: a first electron tube of a cathode grounded type in which an output signal of a condenser microphone unit is input into a grid and output from a plate; a second electron tube in which an output signal from…
- Who is the assignee on this patent?
- Audio Technica Kk
- What technology area does this patent fall under?
- Primary CPC classification H03F1/56. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Tue Mar 07 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).