GB1370851A - Sine-cosine function generator - Google Patents

Sine-cosine function generator

Info

Publication number
GB1370851A
GB1370851A GB74572A GB74572A GB1370851A GB 1370851 A GB1370851 A GB 1370851A GB 74572 A GB74572 A GB 74572A GB 74572 A GB74572 A GB 74572A GB 1370851 A GB1370851 A GB 1370851A
Authority
GB
United Kingdom
Prior art keywords
fet
sawtooth
jan
produces
sine
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
GB74572A
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.)
Singer Co
Original Assignee
Singer Co
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 Singer Co filed Critical Singer Co
Publication of GB1370851A publication Critical patent/GB1370851A/en
Expired legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06G—ANALOGUE COMPUTERS
    • G06G7/00—Devices in which the computing operation is performed by varying electric or magnetic quantities
    • G06G7/12—Arrangements for performing computing operations, e.g. operational amplifiers
    • G06G7/22—Arrangements for performing computing operations, e.g. operational amplifiers for evaluating trigonometric functions; for conversion of co-ordinates; for computations involving vector quantities

Landscapes

  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Algebra (AREA)
  • Mathematical Analysis (AREA)
  • Mathematical Optimization (AREA)
  • Pure & Applied Mathematics (AREA)
  • Software Systems (AREA)
  • Computer Hardware Design (AREA)
  • Details Of Television Scanning (AREA)

Abstract

1370851 Sawtooth wave generators SINGER CO 7 Jan 1972 [21 Jan 1971] 745/72 Heading H3T [Also in Division G4] The sawtooth of Fig. 1 is generated from a signal Hdr (e.g. a CTR horizontal time-base signal) which periodically reverses its sign. During positive periods, the input signal turns on FET switch 15 by means of a diode-connected FET 13, whereby a voltage +V is applied to integrator 17 which produces a positively-going ramp. During negative periods, the input is inverted in amplifier 23 and used to switch on FET 25 which discharges the integrating capacitor 21 and produces a negatively-going ramp. Negative offset to the resultant sawtooth is applied by amplifier circuit 31.
GB74572A 1971-01-21 1972-01-07 Sine-cosine function generator Expired GB1370851A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US10844671A 1971-01-21 1971-01-21

Publications (1)

Publication Number Publication Date
GB1370851A true GB1370851A (en) 1974-10-16

Family

ID=22322273

Family Applications (1)

Application Number Title Priority Date Filing Date
GB74572A Expired GB1370851A (en) 1971-01-21 1972-01-07 Sine-cosine function generator

Country Status (3)

Country Link
US (1) US3688098A (en)
CA (1) CA965516A (en)
GB (1) GB1370851A (en)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4021648A (en) * 1974-06-21 1977-05-03 Hitachi, Ltd. Function generator and application thereof
US4599703A (en) * 1983-11-22 1986-07-08 The United States Of America As Represented By The United States Department Of Energy Low frequency AC waveform generator
DE19701068A1 (en) * 1997-01-15 1998-07-16 Deutsche Telekom Ag Method and circuit arrangement for generating sine / cosine vibrations
US20100002345A1 (en) * 2008-07-02 2010-01-07 Skyworks Solutions, Inc. Radio frequency switch electrostatic discharge protection circuit
US7952395B2 (en) * 2009-10-13 2011-05-31 King Fahd University Of Petroleum And Minerals Universal CMOS current-mode analog function synthesizer
US9112527B2 (en) * 2013-07-10 2015-08-18 Texas Instruments Incorporated Digital-to-analog sinusoidal driver apparatus, systems and methods
US9875084B2 (en) 2016-04-28 2018-01-23 Vivante Corporation Calculating trigonometric functions using a four input dot product circuit

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3018052A (en) * 1956-12-13 1962-01-23 Gen Precision Inc Servo function generator
US3205349A (en) * 1961-10-02 1965-09-07 Electronic Associates Function generator
US3457394A (en) * 1966-03-25 1969-07-22 Astrodata Inc Electronic resolver

Also Published As

Publication number Publication date
CA965516A (en) 1975-04-01
US3688098A (en) 1972-08-29

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Legal Events

Date Code Title Description
PS Patent sealed [section 19, patents act 1949]
PCNP Patent ceased through non-payment of renewal fee