GB1485689A - Untuned waveform synthesis transmitter - Google Patents
Untuned waveform synthesis transmitterInfo
- Publication number
- GB1485689A GB1485689A GB4511375A GB4511375A GB1485689A GB 1485689 A GB1485689 A GB 1485689A GB 4511375 A GB4511375 A GB 4511375A GB 4511375 A GB4511375 A GB 4511375A GB 1485689 A GB1485689 A GB 1485689A
- Authority
- GB
- United Kingdom
- Prior art keywords
- driving means
- combined
- switching
- waveform synthesis
- load
- 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
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K7/00—Modulating pulses with a continuously-variable modulating signal
- H03K7/02—Amplitude modulation, i.e. PAM
Landscapes
- Amplifiers (AREA)
Abstract
1485689 Waveform synthesis MARCONI CO Ltd 31 Oct 1975 [8 Nov 1974] 45113/75 Heading H3H An intuned waveform synthesis transmitter comprises a driving means 1 supplying rectangular switching pulses to at least two switching amplifiers 3, 3<SP>1</SP> ... 5, 5<SP>1</SP> in each of two amplifying sections, the outputs of the switching amplifiers of each section being combined at 6, 6<SP>1</SP> to form two stepped sine waves, combined at 7 to feed a common load 9 through a filter 8. A modulating signal applied to the driving means "outphases" the two sides by equal and opposite amounts, the two phase modulated signals are combined to form an amplitude modulated signal for transmission. Feedback may be provided from level sensing devices in the load or combining means 7 to the driving means to prevent overload, and the amplifiers comprise diode return circuits for energy associated with the reactive components of the load. Details of possible driving means are shown for deriving the switching waveforms from an R.F. generator and A.F. modulator and examples of amplifier circuits are shown (Figs. 7 and 3 and 4, not shown).
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU954274 | 1974-11-08 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1485689A true GB1485689A (en) | 1977-09-14 |
Family
ID=3700286
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4511375A Expired GB1485689A (en) | 1974-11-08 | 1975-10-31 | Untuned waveform synthesis transmitter |
Country Status (2)
| Country | Link |
|---|---|
| AU (1) | AU8562475A (en) |
| GB (1) | GB1485689A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2338852A (en) * | 1998-06-24 | 1999-12-29 | British Gas Plc | Synthesis of a sine wave having continually variable frequency using PWM waveforms |
| CN116545079A (en) * | 2023-07-07 | 2023-08-04 | 宁德时代新能源科技股份有限公司 | Modulation method, modulation device and storage medium of cascade energy storage system |
-
1974
- 1974-11-08 AU AU85624/75A patent/AU8562475A/en not_active Expired
-
1975
- 1975-10-31 GB GB4511375A patent/GB1485689A/en not_active Expired
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2338852A (en) * | 1998-06-24 | 1999-12-29 | British Gas Plc | Synthesis of a sine wave having continually variable frequency using PWM waveforms |
| GB2338852B (en) * | 1998-06-24 | 2002-02-13 | British Gas Plc | Synthesising a sine wave |
| CN116545079A (en) * | 2023-07-07 | 2023-08-04 | 宁德时代新能源科技股份有限公司 | Modulation method, modulation device and storage medium of cascade energy storage system |
| CN116545079B (en) * | 2023-07-07 | 2024-04-09 | 宁德时代新能源科技股份有限公司 | Modulation method, modulation device and storage medium of cascade energy storage system |
Also Published As
| Publication number | Publication date |
|---|---|
| AU8562475A (en) | 1977-04-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |