Research Article
Electronically Tunable Differential Integrator: Linear Voltage Controlled Quadrature Oscillator
Table 2
Comparative summary on the characteristics of some recent quadrature oscillators.
| Reference | Device used | Electronic tunability | (KHz) reported | Linear tuning law | THD (%) |
| [9] | VOA | No | 160 | No | No mention | [10] | CFA | Yes | 80 | Yes | 2.0 | [12] | CDBA | Yes | 900 | No | 3.1 | [11] | CFOA | No | 159 | No | 3.16 | [14] | CDTA | Yes | 1730 | No | 3.0 | [15] | DDCC | No | 1060 | No | No mention | [16] | CCCCTA | Yes | 1100 | No | 1.15~2.94 | [13] | CDBA | No | 16 | No | 1.94 | [17] | OTA | Yes | 64 | Yes | No mention | [18] | DVCCTA | Yes | 348 | No | 4.66 | [19] | DVCCTA | Yes | 3183 | No | No mention | Proposed | CFA-MMCC | Yes | 1800 | Yes | 2.1 |
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Frequency stability in proposed design; also reported in [10]; no mention of in other references above.
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