GB1346904A - Signal filters - Google Patents
Signal filtersInfo
- Publication number
- GB1346904A GB1346904A GB1510271A GB1510271A GB1346904A GB 1346904 A GB1346904 A GB 1346904A GB 1510271 A GB1510271 A GB 1510271A GB 1510271 A GB1510271 A GB 1510271A GB 1346904 A GB1346904 A GB 1346904A
- Authority
- GB
- United Kingdom
- Prior art keywords
- signal
- input
- mixer
- generator
- filter
- 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
- H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
- H03H19/00—Networks using time-varying elements, e.g. N-path filters
- H03H19/004—Switched capacitor networks
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Networks Using Active Elements (AREA)
- Filters And Equalizers (AREA)
Abstract
1346904 Active filters TELEFONAKTIEBOLAGET L M ERICSSON 14 May 1971 [14 May 1970 3 March 1971] 15102/71 Heading H3U The effects of loss resistance in a filter F comprising inductance is reduced by modulating the input signal with an exponentially decaying signal. In a frequency changing filter, a sawtooth generator EG produces a repetitive decaying exponential signal which is mixed with the input frequency changer signal W a before being applied to the input mixer M a . Generator EG also produces a similar repetitive rising exponential signal which is similarly mixed with the signal applied to the output mixer M b . If frequency changing is not required, the sawtooth signals are applied directly to input and output mixers. In a modification, Fig. 7 (not shown), a delay (# a ) is introduced between the generator EG and mixer Mb to compensate for delay in the filter F.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SE7016741A SE371349B (en) | 1969-12-19 | 1970-12-10 | |
SE03115/71A SE354952B (en) | 1970-12-10 | 1971-03-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1346904A true GB1346904A (en) | 1974-02-13 |
Family
ID=26654409
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB1510271A Expired GB1346904A (en) | 1970-12-10 | 1971-05-14 | Signal filters |
Country Status (4)
Country | Link |
---|---|
CA (1) | CA946488A (en) |
DE (1) | DE2124014C3 (en) |
GB (1) | GB1346904A (en) |
SE (1) | SE354952B (en) |
-
1971
- 1971-03-03 SE SE03115/71A patent/SE354952B/xx unknown
- 1971-05-11 DE DE19712124014 patent/DE2124014C3/en not_active Expired
- 1971-05-14 GB GB1510271A patent/GB1346904A/en not_active Expired
- 1971-05-14 CA CA113,054A patent/CA946488A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
DE2124014A1 (en) | 1971-12-02 |
DE2124014B2 (en) | 1974-05-16 |
SE354952B (en) | 1973-03-26 |
DE2124014C3 (en) | 1974-12-19 |
CA946488A (en) | 1974-04-30 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PLNP | Patent lapsed through nonpayment of renewal fees |