Transistor crystal oscillators and the design of a 1-Mc/s oscillator circuit capable of good frequency stability

1965 ◽  
Vol 29 (4) ◽  
pp. 229 ◽  
Author(s):  
P.J. Baxandall
Keyword(s):  
Frequency Stability ◽  
Good Frequency ◽  
Oscillator Circuit ◽  
Crystal Oscillators

scholarly journals A Method to Increase the Frequency Stability of a TCXO by Compensating Thermal Hysteresis

Sensors ◽  
2020 ◽  
Vol 20 (23) ◽  
pp. 6812
Author(s):  
Zhaoyang Wang ◽  
Jie Wu
Keyword(s):  
Thermal Hysteresis ◽  
Frequency Stability ◽  
Automotive Electronics ◽  
Frequency Compensation ◽  
Crystal Oscillator ◽  
Industrial Control ◽  
Temperature Changes ◽  
Measuring Devices ◽  
Different Temperatures ◽  
Crystal Oscillators

Due to the rapid growth of electronic information technology, the need for the higher stability of crystal oscillators has increased. The temperature-compensated X’tal (crystal) oscillator (TCXO), a type of crystal oscillator with high frequency stability, has been widely used in communications, sensor networks, automotive electronics, industrial control, measuring devices, and other equipment. The traditional TCXO only performs frequency compensation based on the current temperature, without considering the error caused by thermal hysteresis. As the frequency stability of the TCXO improves, the thermal hysteresis of the crystal oscillator has a negligible influence on the frequency stability of the crystal oscillator. This study measured different compensation tables for hysteresis curves at different temperatures and used a microprocessor to store the historical information of crystal temperature changes. Furthermore, corresponding algorithms were designed to select the correct values, according to the temperature change history, to compensate for the thermal hysteresis of the crystal oscillator error. Experiments show that this method can reduce the hysteresis error of the crystal oscillator from 700 to 150 ppb (−40 to 80 °C).

scholarly journals Single-Resistance-Controlled Sinusoidal Oscillator Using Single VD-DIBA

2013 ◽  
Vol 2013 ◽  
pp. 1-5 ◽  
Author(s):  
K. L. Pushkar ◽  
D. R. Bhaskar ◽  
Dinesh Prasad
Keyword(s):  
Frequency Stability ◽  
Good Frequency ◽  
Independent Control ◽  
Differential Input ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation

This paper presents a new single-resistance-controlled sinusoidal oscillator (SRCO). The proposed oscillator employs only one voltage differencing differential input buffered amplifier (VD-DIBA), two resistors, and two grounded capacitors. The proposed configuration offers the following advantageous features: (i) independent control of condition of oscillation and frequency of oscillation, (ii) low active and passive sensitivities, and (iii) a very good frequency stability. The validity of the proposed SRCO has been established by SPICE simulations using 0.35 μm MIETEC technology.

CW, single-mode, tunable GaAs laser system with good frequency stability

1975 ◽  
Vol 6 (3) ◽  
pp. 373-379 ◽  
Author(s):  
J. L. Picqué ◽  
S. Roizen ◽  
H. H. Stroke ◽  
O. Testard
Keyword(s):  
Laser System ◽  
Single Mode ◽  
Frequency Stability ◽  
Good Frequency ◽  
Gaas Laser

Effect of excess PbO on the microstructures and electric field induced strain of Pb0.97La0.02(Zr0.63Sn0.26Ti0.11)O3 antiferroelectric ceramics

2014 ◽  
Vol 07 (01) ◽  
pp. 1350072 ◽  
Author(s):  
Q. F. Zhang ◽  
Z. Xiao ◽  
X. C. Wang ◽  
T. Q. Yang ◽  
J. F. Wang ◽  
...  
Keyword(s):  
Electric Field ◽  
Low Frequency ◽  
Frequency Stability ◽  
Good Frequency ◽  
Potential Candidate ◽  
X Ray Diffraction ◽  
X Ray ◽  
Sintering Properties ◽  
The Stability ◽  
Electric Field Induced Strain

Microstructures and electrical properties of ( Pb 0.97 La 0.02)( Zr 0.63 Sn 0.26 Ti 0.11) O 3 (PLZST) antiferroelectric (AFE) ceramics with different PbO content were investigated in this study. X-ray diffraction analysis showed that with the increase of PbO amount, the stability of AFE phase reduced due to the decrease of lead vacancies. Besides, it was observed that the sintering properties could be improved by adding a small amount of PbO . Further, the electric field induced polarization and strain first increased, and then decreased with increasing PbO addition and they showed good frequency stability at low frequency. The maximum strain of 0.65% was obtained in the specimens with 8 mol% PbO content at the frequency 1 Hz. Both a high strain level and relatively good frequency stability in this composition can make a potential candidate for actuators applications over a wide-frequency working range.

Asymmetric Entrainment Structure of Pierce Oscillator Circuit

2020 ◽  
pp. 2150066
Author(s):  
Kazuyoshi Ishimura ◽  
Ryota Inden ◽  
Naoto Komeno ◽  
Isao T. Tokuda
Keyword(s):  
Communication Systems ◽  
External Forcing ◽  
Dimensional Parameter ◽  
Oscillator Circuit ◽  
Fast Circuit ◽  
Optimal Network ◽  
Asymmetric Shape ◽  
Impedance Curve ◽  
Crystal Oscillators ◽  
Capacitive Reactance

Experimental study is presented to uncover entrainment property of Pierce oscillator circuit (i.e., one of the most standard circuits for crystal oscillators) subject to sinusoidal external forcing. In contrast to the well-known Arnold tongues observed in a wide class of forced nonlinear systems, asymmetric shape was observed as an entrainment region of the circuit in two-dimensional parameter space spanned by the external forcing strength and frequency. Computation of the impedance curve revealed that the asymmetric shape is due to positive (inductive) or negative (capacitive) reactance of the Pierce circuit, which facilitates or inhibits the circuit oscillations. We extend this insight into two coupled Pierce circuits and show that, to efficiently achieve their synchronization, it is advantageous to drive a slow oscillator circuit by a fast circuit rather than to drive a fast circuit by a slow circuit. Our study provides a guideline on an optimal network configuration for coupled crystal oscillators, which may find applications in distributed digital clocks and wireless communication systems.

scholarly journals Electronically Controllable Explicit Current Output Sinusoidal Oscillator Employing Single VDTA

2012 ◽  
Vol 2012 ◽  
pp. 1-5 ◽  
Author(s):  
Dinesh Prasad ◽  
D. R. Bhaskar
Keyword(s):  
Current Mode ◽  
Frequency Stability ◽  
Good Frequency ◽  
View Point ◽  
Current Output ◽  
Transconductance Amplifier ◽  
Sinusoidal Oscillator ◽  
Condition Of Oscillation ◽  
Ready Availability ◽  
Electronically Controllable

A new current-mode sinusoidal oscillator employing a single voltage differencing transconductance amplifier (VDTA), two grounded capacitors, and one grounded resistor has been proposed. The proposed sinusoidal oscillator offers the following advantageous features: (i) use of grounded capacitors which are attractive from the view point of IC implementation as well as eliminating/accommodating parasitic capacitances, (ii) independent control of frequency of oscillation and condition of oscillation, (iii) ready availability of explicit current-mode output, (iv) low active and passive sensitivities, and (v) a very good frequency stability. The workability of the proposed configuration has been established by PSPICE simulations.

Design of transferred-electron amplifiers with good frequency stability

1977 ◽  
Vol 24 (3) ◽  
pp. 270-274 ◽  
Author(s):  
C. Berry ◽  
G.S. Hobson ◽  
M.J. Howard ◽  
P.N. Robson
Keyword(s):  
Frequency Stability ◽  
Good Frequency
Sign in / Sign up

Export Citation Format

Share Document