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GB1121760A - Amplitude-to-frequency converters - Google Patents

Amplitude-to-frequency converters

Info

Publication number
GB1121760A
GB1121760A GB3987666A GB3987666A GB1121760A GB 1121760 A GB1121760 A GB 1121760A GB 3987666 A GB3987666 A GB 3987666A GB 3987666 A GB3987666 A GB 3987666A GB 1121760 A GB1121760 A GB 1121760A
Authority
GB
United Kingdom
Prior art keywords
feedback
output
voltage
frequency
capacitor
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
GB3987666A
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.)
Siemens AG
Siemens Corp
Original Assignee
Siemens AG
Siemens Corp
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
Priority claimed from DES83825A external-priority patent/DE1199880B/en
Application filed by Siemens AG, Siemens Corp filed Critical Siemens AG
Publication of GB1121760A publication Critical patent/GB1121760A/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
    • H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
    • H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
    • H03K3/26—Generators characterised by the type of circuit or by the means used for producing pulses by the use, as active elements, of bipolar transistors with internal or external positive feedback

Landscapes

  • Analogue/Digital Conversion (AREA)

Abstract

1,121,760. Pulse frequency modulation. SIEMENS A.G. 6 Sept., 1966 [10 Sept., 1965], No. 39876/66. Addition to 1,053,513. Heading H4L. A voltage-controlled oscillator of the type in which the input voltage U e is integrated by amplifier V and capacitor C i until a threshold level is reached when a detector D provides an output pulse at A which is fed back to reset the capacitor C i , is characterized in that the output at A is converted in unit FSU to a voltage proportional to frequency which voltage is used to control the feedback to capacitor C i . In Fig. 1 there are two feedback units K o and R 1 , K 0 providing a constant feedback charge and K 1 a feedback charge dependent on output frequency since its power supply is derived from the frequency discriminator FSU; the latter comprises an amplifier T 3 feeding a rectifier D 2 and integrator C 2 with R 2 and R 3 . A modified circuit, Fig. 2 (not shown), includes a single feedback unit K 3 fed from a constant power supply and including magnetically controlled resistors (RX and RY) situated in a magnetic field controlled by the output of the discriminator FSU. The response of the circuits is non-linear and may be such as to compensate for non-linearity of an input transducer, e.g. a thermocouple.
GB3987666A 1963-02-19 1966-09-06 Amplitude-to-frequency converters Expired GB1121760A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DES83825A DE1199880B (en) 1963-02-19 1963-02-19 Voltage frequency converter based on the charge compensation method
DES0099361 1965-09-10

Publications (1)

Publication Number Publication Date
GB1121760A true GB1121760A (en) 1968-07-31

Family

ID=25997143

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3987666A Expired GB1121760A (en) 1963-02-19 1966-09-06 Amplitude-to-frequency converters

Country Status (3)

Country Link
BE (1) BE686706A (en)
GB (1) GB1121760A (en)
NL (2) NL6400515A (en)

Also Published As

Publication number Publication date
BE686706A (en) 1967-03-09
NL6400515A (en) 1964-08-20
NL6610247A (en) 1967-03-13

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