GB1178898A - Radio-Frequency Circuit Arrangement for Capacitive Electroacoustic Transducers - Google Patents
Radio-Frequency Circuit Arrangement for Capacitive Electroacoustic TransducersInfo
- Publication number
- GB1178898A GB1178898A GB5630667A GB5630667A GB1178898A GB 1178898 A GB1178898 A GB 1178898A GB 5630667 A GB5630667 A GB 5630667A GB 5630667 A GB5630667 A GB 5630667A GB 1178898 A GB1178898 A GB 1178898A
- Authority
- GB
- United Kingdom
- Prior art keywords
- bridge
- transformer
- voltage
- radio
- circuit arrangement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R19/00—Electrostatic transducers
- H04R19/04—Microphones
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Circuit For Audible Band Transducer (AREA)
Abstract
1,178,898. Microphone circuits; amplifiers. AKUSTISCHE U. KINO-GERATE G.m.b.H. 12 Dec., 1967 [30 Dec., 1966], No. 56306/67. Headings H3B and H4J. A capacitive transducer, e.g. a capacitor microphone, C K is connected in a bridge circuit including a reference capacitor C1 and inductors L 0 and L 1 . The bridge is fed with a radio frequency voltage at the resonant frequency of L 1 C 1 , applied across terminals AB from an oscillator M 0 , and the unbalance voltage of the bridge is taken across terminals CD via a transformer T1. The secondary of transformer T1 is connected in a phase sensitive detector circuit comprising a transformer T2 whose primary is fed from the bridge supply source, with the bridge output voltage applied to the centre tap of the secondary winding. A voltage dependent on the capacitance variations of the transducer C K is developed across the circuit output transformer.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT1204366A AT266232B (en) | 1966-12-30 | 1966-12-30 | High-frequency circuit for elongation converters, in particular condenser microphones |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1178898A true GB1178898A (en) | 1970-01-21 |
Family
ID=3631970
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5630667A Expired GB1178898A (en) | 1966-12-30 | 1967-12-12 | Radio-Frequency Circuit Arrangement for Capacitive Electroacoustic Transducers |
Country Status (3)
| Country | Link |
|---|---|
| AT (1) | AT266232B (en) |
| DE (1) | DE1537580A1 (en) |
| GB (1) | GB1178898A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ302207B6 (en) * | 2007-10-31 | 2010-12-15 | Ceské vysoké ucení technické v Praze | Blumlein bridge |
-
1966
- 1966-12-30 AT AT1204366A patent/AT266232B/en active
-
1967
- 1967-11-29 DE DE19671537580 patent/DE1537580A1/en active Pending
- 1967-12-12 GB GB5630667A patent/GB1178898A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CZ302207B6 (en) * | 2007-10-31 | 2010-12-15 | Ceské vysoké ucení technické v Praze | Blumlein bridge |
Also Published As
| Publication number | Publication date |
|---|---|
| AT266232B (en) | 1968-11-11 |
| DE1537580A1 (en) | 1970-01-15 |
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