Novel hybrid type Automatic Amplitude Control loop VCO

2011 ◽  
Author(s):  
Yuxiang Zhang ◽  
Chirn Chye Boon ◽  
Yannan Miao ◽  
Manh Anh Do ◽  
Kiat Seng Yeo
Keyword(s):  
Control Loop ◽  
Amplitude Control ◽  
Hybrid Type ◽  
Automatic Amplitude Control ◽  
Automatic Amplitude

scholarly journals DESIGN AND ANALYSIS OF A 2.4 GHz HYBRID TYPE AUTOMATIC AMPLITUDE CONTROL VCO WITH FORWARD NOISE REDUCTION

2014 ◽  
Vol 23 (04) ◽  
pp. 1450048
Author(s):  
Y. X. ZHANG ◽  
C. C. BOON ◽  
K. S. YEO
Keyword(s):  
Transient Analysis ◽  
Voltage Controlled Oscillator ◽  
Amplitude Variation ◽  
Worst Case ◽  
Amplitude Control ◽  
Hybrid Type ◽  
Automatic Amplitude Control ◽  
Automatic Amplitude ◽  
Analysis Design ◽  
Offset Frequency

This paper presents a voltage-controlled oscillator (VCO) with automatic amplitude control (AAC) loop. The proposed AAC VCO employs a hybrid type AAC loop and targets the Industrial, Scientific and Medical (ISM) band applications. The proposed AAC loop can also prevent the AAC from generating extra noise to the VCO and avoid stability problem which is common for conventional AAC loop. Detail transient analysis of this AAC VCO is derived. Based on this analysis, design steps applicable for such type of AAC loop is obtained. Measurement result shows the peak amplitude variation over the operation range of 2.25–2.54 GHz is less than 9 mV (without the AAC loop, amplitude variation can be as large as 40 mV, or 22.2% for 180 mV amplitude). Power consumption of the proposed AAC VCO is 4.5 mW while the power consumed by the loop is 0.8 mW and phase noise is -105 dBc/Hz at 100 kHz offset frequency. Worst case settling time is less than 10.5 μs.

Wideband Q-VCO using tail-current shaping based automatic amplitude control

2013 ◽  
Vol 44 (5) ◽  
pp. 367-372 ◽  
Author(s):  
De-zhi Wang ◽  
Ke-feng Zhang ◽  
Xue-cheng Zou
Keyword(s):  
Amplitude Control ◽  
Tail Current ◽  
Automatic Amplitude Control ◽  
Automatic Amplitude
Sign in / Sign up

Export Citation Format

Share Document