GB581811A - Pulse modulation signalling systems - Google Patents

Pulse modulation signalling systems

Info

Publication number
GB581811A
GB581811A GB18030/42A GB1803042A GB581811A GB 581811 A GB581811 A GB 581811A GB 18030/42 A GB18030/42 A GB 18030/42A GB 1803042 A GB1803042 A GB 1803042A GB 581811 A GB581811 A GB 581811A
Authority
GB
United Kingdom
Prior art keywords
pulse
pulses
grid
signal
resistance
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
Application number
GB18030/42A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pye Electronic Products Ltd
Original Assignee
Pye Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Pye Ltd filed Critical Pye Ltd
Priority to GB18030/42A priority Critical patent/GB581811A/en
Priority to US516491A priority patent/US2418268A/en
Publication of GB581811A publication Critical patent/GB581811A/en
Expired legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/06—Frequency or rate modulation, i.e. PFM or PRM
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03K—PULSE TECHNIQUE
    • H03K7/00—Modulating pulses with a continuously-variable modulating signal
    • H03K7/04—Position modulation, i.e. PPM
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B14/00—Transmission systems not characterised by the medium used for transmission
    • H04B14/02—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation
    • H04B14/026—Transmission systems not characterised by the medium used for transmission characterised by the use of pulse modulation using pulse time characteristics modulation, e.g. width, position, interval

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Measurement Of Velocity Or Position Using Acoustic Or Ultrasonic Waves (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Electrotherapy Devices (AREA)

Abstract

581,811. Pulse modulation; pulse generating circuits. LAWSON, D. I., and PYE, Ltd. Dec. 18, 1942, No. 18030. [Class 40 (v)] Signals are transmitted as a sequence of constant-width pulses, of which the timing, phasing, or frequency is varied in accordance with the signal voltage. The pulses may be radiated on an ultra-high frequency wave. In Fig. 5, a sinusoidal wave of pulse frequency is modulated in amplitude by the signal M and the resultant applied to trigger a pulse generator at a particular voltage level S, with the result that the pulses P shown in the lower part of the Figure are modulated in phase. In Fig. 6 a transitron pulse generator comprises a pentode valve V with a condenser C2 connecting the screen grid to a point between resistances R5, R6 in the earth connection of the suppressor grid. The circuit oscillates by virtue of negative transconductance between the screen current and suppressor grid voltage, and the pulses are sharpened by the provision of the coil L and resistance R9 in the cathode lead. The signal voltage is applied to the control grid, and a wave S of pulse frequency to the suppressor and screen grids, causing phasemodulated pulses P to appear across the cathode impedance L, R9. The pulse generator may comprise a multi-vibrator circuit with reciprocally-coupled valves, and the signal and the pulse-synchronizing waves may be applied respectively to the grid and cathode of one of the valves (Fig. 7, not shown). The generator may alternatively comprise a cascade pair of valves coupled by resistance-capacity coupling, and with a back coupling afforded by a resistance common to the cathode leads (Fig. 8, not shown). Reception is effected by applying the pulses in the positive sense to the grid of a valve V13, Fig. 9, thereby discharging the condenser C13, which during the pulse gaps is being charged through a resistance R13. The signal is taken off across the condenser through a low-pass filter. Specifications 511,222 and 523,575 are referred to.
GB18030/42A 1942-12-18 1942-12-18 Pulse modulation signalling systems Expired GB581811A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB18030/42A GB581811A (en) 1942-12-18 1942-12-18 Pulse modulation signalling systems
US516491A US2418268A (en) 1942-12-18 1943-12-31 Pulse modulation signalling system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB18030/42A GB581811A (en) 1942-12-18 1942-12-18 Pulse modulation signalling systems

Publications (1)

Publication Number Publication Date
GB581811A true GB581811A (en) 1946-10-25

Family

ID=10105424

Family Applications (1)

Application Number Title Priority Date Filing Date
GB18030/42A Expired GB581811A (en) 1942-12-18 1942-12-18 Pulse modulation signalling systems

Country Status (2)

Country Link
US (1) US2418268A (en)
GB (1) GB581811A (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413707A1 (en) * 1984-12-03 1991-02-27 Larry W Fullerton Time domain radio transmission system.
US6882301B2 (en) 1986-06-03 2005-04-19 Time Domain Corporation Time domain radio transmission system
US6933882B2 (en) 1986-06-03 2005-08-23 Time Domain Corporation Time domain radio transmission system
USRE39759E1 (en) 1984-12-03 2007-08-07 Time Domain Corporation Time domain radio transmission system
USRE41479E1 (en) 1984-12-03 2010-08-10 Time Domain Corporation Time domain radio transmission system

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE465736A (en) * 1943-01-07
US2507351A (en) * 1945-11-23 1950-05-09 Well Surveys Inc Transmitting of information in drill holes
US2459462A (en) * 1946-03-16 1949-01-18 Rca Corp Two-tone keyer
US2482561A (en) * 1946-03-19 1949-09-20 Rca Corp Voltage two-tone source
US2578253A (en) * 1946-04-03 1951-12-11 Richard B Lawrance Pulse modulator
US2456089A (en) * 1946-06-26 1948-12-14 Rca Corp Wide band frequency modulator
US2547004A (en) * 1946-08-01 1951-04-03 Farnsworth Res Corp Pulse generating device
US2536654A (en) * 1947-01-04 1951-01-02 Rca Corp Pulse multiplex transmission system
US2629856A (en) * 1949-12-19 1953-02-24 Fed Telecomm Lab Inc Ptm modulator and demodulator system
US2885547A (en) * 1953-06-16 1959-05-05 Gen Precision Lab Inc Pulse train genera tor with variable pulse length
US2791741A (en) * 1954-03-08 1957-05-07 Nathaniel L Cohen Voltage amplitude control
US3168721A (en) * 1959-07-27 1965-02-02 Technical Measurement Corp Information transfer systems
US3260785A (en) * 1963-10-17 1966-07-12 William H Krug Vibrato circuit
US3373378A (en) * 1965-02-15 1968-03-12 North American Rockwell Pulse width modulator
US3453546A (en) * 1966-11-04 1969-07-01 Nasa Telemeter adaptable for implanting in an animal
US3475742A (en) * 1967-01-19 1969-10-28 Eckrich Peter & Sons Temperature telemetering system

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2171150A (en) * 1939-08-29 Electronic modulator fob constant
BE428656A (en) * 1937-06-18
NL87334C (en) * 1938-10-03
GB523575A (en) * 1939-01-06 1940-07-17 Kolster Brandes Ltd Improvements in or relating to methods of generating pulses characteristic of sound and like waves
US2262406A (en) * 1940-11-26 1941-11-11 Radio Patents Corp Frequency modulation system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0413707A1 (en) * 1984-12-03 1991-02-27 Larry W Fullerton Time domain radio transmission system.
EP0413707A4 (en) * 1984-12-03 1993-02-24 Larry W Fullerton Time domain radio transmission system
USRE39759E1 (en) 1984-12-03 2007-08-07 Time Domain Corporation Time domain radio transmission system
USRE41479E1 (en) 1984-12-03 2010-08-10 Time Domain Corporation Time domain radio transmission system
US6882301B2 (en) 1986-06-03 2005-04-19 Time Domain Corporation Time domain radio transmission system
US6933882B2 (en) 1986-06-03 2005-08-23 Time Domain Corporation Time domain radio transmission system

Also Published As

Publication number Publication date
US2418268A (en) 1947-04-01

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